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This newly added file will:
- Describe the characteristics of 2 general types of console drivers
- How to use the sysfs to unbind and bind console drivers
- Uses for this feature
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Update Documentation/fb/fbcon.txt to reflect the following changes:
1. Simple illustration of the binding of the console down to individual
framebuffer drivers
2. Usage of userspace tools to help with recovery of text console
3. How to use the attributes in /sys/class/tty/console to unload fbcon and
the framebuffer drivers
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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The control for binding/unbinding is moved from fbcon to the console layer.
Thus the fbcon sysfs attributes, attach and detach, are also gone.
1. Add a notifier event that tells fbcon if a framebuffer driver has been
unregistered. If no registered driver remains, fbcon will unregister
itself from the console layer.
2. Replaced calls to give_up_console() with unregister_con_driver().
3. Still use take_over_console() instead of register_con_driver() to
maintain compatibility
4. Respect the parameter first_fb_vc and last_fb_vc instead of using 0 and
MAX_NR_CONSOLES - 1. These parameters are settable by the user.
5. When fbcon is completely unbound from the console layer, fbcon will
also release (iow, decrement module reference counts to zero) all fbdev
drivers. In other words, a bind or unbind request from the console layer
will propagate down to the framebuffer drivers.
6. If fbcon is not bound to the console, it will ignore all notifier
events (except driver registration and unregistration) and all sysfs
requests.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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The framebuffer console is now able to dynamically bind and unbind from the VT
console layer. Due to the way the VT console layer works, the drivers
themselves decide when to bind or unbind. However, it was decided that
binding must be controlled, not by the drivers themselves, but by the VT
console layer. With this, dynamic binding is possible for all VT console
drivers, not just fbcon.
Thus, the VT console layer will impose the following to all VT console
drivers:
- all registered VT console drivers will be entered in a private list
- drivers can register themselves to the VT console layer, but they cannot
decide when to bind or unbind. (Exception: To maintain backwards
compatibility, take_over_console() will automatically bind the driver after
registration.)
- drivers can remove themselves from the list by unregistering from the VT
console layer. A prerequisite for unregistration is that the driver must not
be bound.
The following functions are new in the vt.c:
register_con_driver() - public function, this function adds the VT console
driver to an internal list maintained by the VT console
bind_con_driver() - private function, it binds the driver to the console
take_over_console() is changed to call register_con_driver() followed by a
bind_con_driver(). This is the only time drivers can decide when to bind to
the VT layer. This is to maintain backwards compatibility.
unbind_con_driver() - private function, it unbinds the driver from its
console. The vacated consoles will be taken over by the default boot console
driver.
unregister_con_driver() - public function, removes the driver from the
internal list maintained by the VT console. It will only succeed if the
driver is currently unbound.
con_is_bound() checks if the driver is currently bound or not
give_up_console() is just a wrapper to unregister_con_driver().
There are also 3 additional functions meant to be called only by the tty layer
for sysfs control:
vt_bind() - calls bind_con_driver()
vt_unbind() - calls unbind_con_driver()
vt_show_drivers() - shows the list of registered drivers
Most VT console drivers will continue to work as is, but might have problems
when unbinding or binding which should be fixable with minimal changes.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Update Documentation/fb/fbcon.txt on the following:
1. sysfs attributes are now located in class/graphics/fbcon
2. instructions on how to attach, detach and/or unload fbcon
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Add the ability to detach and attach the framebuffer console to and from the
vt layer. This is done by echo'ing any value to sysfs attributes located in
class/graphics/fbcon. The two attributes are:
attach - bind fbcon to the vt layer
detach - unbind fbcon from the vt layer
Once fbcon is detached from the vt layer, fbcon can be unloaded if compiled as
a module. This feature is quite useful for developers who work on the
framebuffer or console subsystem. This is also useful for users who want to
go to text mode or graphics mode without having to reboot.
Directly unloading the fbcon module is not possible because the vt layer
increments the module reference count for all bound consoles. Detaching fbcon
decrements the module reference count to zero so unloading becomes possible.
Detaching fbcon may interfere with X and/or DRM.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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To detach fbcon, it must also clean up all resources it allocated. This was
never done before because fbcon cannot be unloaded.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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In order for this feature to work, an interface will be needed. The most
appropriate is sysfs. However, the framebuffer console has no sysfs entry
yet. This will create a sysfs class device entry for fbcon under
/sys/class/graphics.
Add a class_device entry 'fbcon' under class 'graphics'. Console-specific
attributes which where previously under class/graphics/fb[x] are moved to
class/graphics/fbcon. These attributes, 'con_rotate' and 'con_rotate_all',
are also renamed to 'rotate' and 'rotate_all' respectively.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Detaching fbcon allows individual drivers to be unloaded. However several
drivers call pci_disable_device() upon exit. This function will disable the
BAR's which will kill VGA text mode and/or affect X/DRM.
To prevent this, remove calls to pci_disable_device() from several drivers.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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To allow for detaching fbcon, it must be able to give up the console.
However, the function give_up_console() is plain broken. It just sets the
entries in the console driver map to NULL, it leaves the vt layer without a
console driver, and does not decrement the module reference count. Calling
give_up_console() is guaranteed to hang the machine..
To fix this problem, ensure that the virtual consoles are not left dangling
without a driver. All systems have a default boot driver (either vgacon or
dummycon) which is never unloaded. For those vt's that lost their driver, the
default boot driver is reassigned back to them.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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One of the limitations of the framebuffer console system is its inablity to
unload or detach itself from the console layer. And once it loads, it also
locks in framebuffer drivers preventing their unload. Although the con2fbmap
utility does provide a means to unload individual drivers, it requires that at
least one framebuffer driver is loaded for use by fbcon.
With this change, it is possible to detach fbcon from the console layer. If it
is detached, it will reattach the boot console driver (which is permanently
loaded) back to the console layer so the system can continue to work. As a
consequence, fbcon will also decrement its reference count of individual
framebuffer drivers, allowing all of these drivers to be unloaded even if
fbcon is still loaded.
Unless you use drivers that restores the display to text mode (rivafb and
i810fb, for example), detaching fbcon does require assistance from userspace
tools (ie, vbetools) for text mode to be restored completely. Without the
help of these tools, fbcon will leave the VGA console corrupted. The methods
that can be used will be described in Documentation/fb/fbcon.txt.
Because the vt layer also increments the module reference count for each
console driver, fbcon cannot be directly unloaded. It must be detached first
prior to unload.
Similarly, fbcon can be reattached to the console layer without having to
reload the module. A nice feature if fbcon is compiled statically.
Attaching and detaching fbcon is done via sysfs attributes. A class device
entry for fbcon is created in /sys/class/graphics. The two attributes that
controls this feature are detach and attach. Two other attributes that are
piggybacked under /sys/class/graphics/fb[n] that are fbcon-specific,
'con_rotate' and 'con_rotate_all' are moved to fbcon. They are renamed as
'rotate' and 'rotate_all' respectively.
Overall, this feature is a great help for developers working in the
framebuffer or console layer. There is not need to continually reboot the
kernel for every small change. It is also useful for regular users who wants
to choose between a graphical console or a text console without having to
reboot.
Example usage for x86:
/* start in text mode */
modprobe xxxfb
modprobe fbcon
/* graphical mode with fbcon using xxxfb */
echo 1 > /sys/class/graphics/fbcon/detach
/* back to text mode, will produce corrupt display unless vbetool is used */
rmmod xxxfb
modprobe yyyfb
/* back to graphical mode with fbcon using yyyfb */
Before trying out this feature, please read Documentation/fb/fbcon.txt.
This patch:
In order for fbcon to detach itself from the console layer, vgacon, which is a
boot console driver, must be fixed so it can retake the console multiple
times, not just during init. The following needs to be done:
- remove __init from the vgacon_startup, this is called again by
take_over_console().
- vc->rows and vc->cols are set manually by vgacon during init. After init,
vc_resize() can be used
- make sure the scrollback_buffer is not reallocated
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Modify the sysfs description of a video mode such that modes are tagged with
their scan type, (p)rogessive, (i)nterlaced, (d)ouble scan. For example,
U:1920x1080i-50. This is useful to disambiguate some of the 'consumer' video
timings found in CEA-861 (especially those for EDTV).
Signed-off-by: Daniel R Thompson <daniel.thompson@st.com>
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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This patch adds a new framebuffer driver for the Intel Based macs. This
framebuffer is needed when booting from EFI to get something out the box.
[akpm: note: doesn't support modular building]
[akpm@osdl.org: cleanups]
Signed-off-by: Edgar Hucek <hostmaster@ed-soft.at>
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Fix the following warning:
WARNING: drivers/video/aty/atyfb.o - Section mismatch: reference to
.init.text:aty_init_cursor from .text between 'aty_init' (at offset 0x241d)
and 'atyfb_blank'
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Fix the following warning:
WARNING: drivers/video/macmodes.o - Section mismatch: reference to
.init.text:mac_find_mode from __ksymtab after '__ksymtab_mac_find_mode' (at
offset 0x10)
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Logo drawing crashes or produces a corrupt display if the logo width and
height are not equal. The dimensions are transposed prior to the actual
rotation and the width is used instead of the height in the actual rotation
code. These produce a corrupt image.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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This is a fix for the most annoying problem that remained with neofb:
After "setterm -powersave powerdown" the console blanker will disable the
backlight after the given timeout expires. If this happens after the lid
has been shut, we read "LCD off" from the register and store that in the
driver. Once the lid is opened, the backlight turns on, but any key press
that would awaken the blanked console will switch the backlight off again.
The workaround so far was to use the "display config toggle" Fn key combo -
once if no external display is attached, otherwise as often as required to
restore the desired display setup.
The following patch fixes the issue at least for the LCD-only case, with no
external monitor attached. Other display setup permutations are pending
further testing, but so far I can guarantee at least no negative change in
behaviour, if any at all.
Signed-off-by: Christian Trefzer <ctrefzer@gmx.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Acked-by: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Add power management support
[akpm@osdl.org: cleanup]
Signed-off-by: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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CONFIG_FB = m and CONFIG_{BACKLIGHT:LCD}_CLASS_DEVICE = y is possible
resulting in link errors. Fix by making backlight and lcd class also depend
on FB
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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regs.lcdcon1 was not updated on suspend. The result was a garbaged display on
resume. This bug was first noticed by Christer Weinigel. This patch is a
modified version of the one he sent to me.
Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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This patch removes the following unused EXPORT_SYMBOL's:
- fbcvt.c: fb_find_mode_cvt
- fbmem.c: fb_con_duit
- fbmem.c: fb_new_modelist
- macmodes.c: mac_var_to_vmode
- modedb.c: fb_delete_videomode
- modedb.c: fb_destroy_modelist
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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It's a false positive, but let's suppress it anyway.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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It's a false positive, but let's suppress it anyway.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Coverity Bug 68:
Fix dead code
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Delay the update of the visible framebuffer console until all other consoles
have been initialized in order to avoid losing information. This only seems
to be a problem with modules, not with built-in drivers.
Signed-off-by: David Hollister <david.hollister@amd.com>
Signed-off-by: Jordan Crouse <jordan.crouse@amd.com>
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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- As per VESA specs, use the VGA registers to set the palette if the mode is
VGA compatible. Otherwise, use the protected mode interface.
- Make pmi_setpal default to 1
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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If the hardware palette cannot be accessed, make vesafb_setcolreg return a
nonzero value.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Adds 1366x768 @ 60Hz to drivers/video/modedb.c.
Signed-off-by: Dennis Munsie <dmunsie@cecropia.com>
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Add support for Geforce 6100 and related chipsets (PCI device id 0x024x)
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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- make firmware edid independent from framebuffer (No need to choose
framebuffer just to disable this option
- enable this option in X86_64
- check if VBE/DDC function is implemented before calling actual function
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Whitespace cleanup
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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A static pseudocolor visual with depth less than 4 does exist, so let's not
accidentally upscale the depth with this configuration
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Update platform code to dynamically allocate the platform device
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Update platform code to dynamically allocate the platform device
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Update platform code to dynamically allocate the platform device
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Update platform code to dynamically allocate the platform device
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Set the appropriate acceleration flags so fbcon can choose the optimal
scrolling mode.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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The drawing functions of atyfb is unecessary syncing the GPU which is
affecting performance. Remove the calls, any direct access by fbcon to the
framebuffer will always be preceeded by a call to atyfb_sync().
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Fix image and color handling in atyfb_cursor()
- In the 2-bit scheme of the cursor image, just set the first bit to be
always zero (turn off transparency and/or XOR), and just do the masking
manually
- The cursor color is converted into 32-bit RGBA8888 using struct fb_cmap.
Each component in the cmap is u16 in size, so mask the upper 8 bits.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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nVidia is churning out chipsets like there's no tomorrow. And even though the
pci_device_id table now has numerous entries, it is still not guaranteed that
all supported devices are included or will be included.
Fortunately, nvidiafb has chipset detection logic built in. So, change the
contents of the pci_device_id table so it will capture all nVidia devices of
the display class. Unsupported chipsets will then be filtered out by
nvidiafb's detection logic.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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The EDID block should specify the display's operating limits (vertical and
horizontal sync ranges, and maximum dot clock). If not given by the EDID
block, the ranges are extrapolated from the modelist. However, the
computation used is only a rough approximation, and the resulting values may
not reflect the actual capability of the display. This problem is frequently
encountered when the EDID block has a single entry, the single mode entry will
fail validation.
To prevent this, calculate the values based on the same method used in
fb_validate_mode().
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Remove unneeded duplicate #include's of the same header file.
In the case of fbmon.c linux/pci.h is now #include'd unconditional, but
this should be safe.
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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We had three (sic) VIDEO_SELECT options:
- two in drivers/video/Kconfig
- one in drivers/video/console/Kconfig
This patch removes the two options in drivers/video/Kconfig and also removes
the unneeded usage in drivers/video/sis/sis_main.c .
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Add backlight intensity control to the LOCOMO lcd/backlight driver using the
backlight class and add basic power management support.
This is a reimplementation and improvement of patches by John Lenz and Pavel
Machek
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Cc: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Reported by: Rich (Bugzilla Bug 6417)
"if savage driver is used in x.org together with savagefb, it results in
seriously garbled and distorted screen - coupled with severe slowdowns."
This bug is the result of Xorg unable to handle savagefb altering the
hardware which results in X failing to start properly and/or failed console
switching.
Add savagefb_state_save and savagefb_state_restore. These hooks will only
save and restore the extended VGA registers. Standard VGA registers will be
left alone. This is enough to make savagefb play nicely with the latest
Xorg savage driver, and perhaps with savage DRI. (Transient screen artifacts
may appear before X loads and during console switches).
(Unfortunately, blanking the screen also leaves Xorg in a blanked state, so I
have to unblank the screen before Xorg loads. So I doubt if the transient
screen artifacts will be completely invisible but hopefully it will only be
for a shorter duration (not much).)
[akpm@osdl.org: cleanups]
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Cc: <rich@hq.vsaa.lv>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Allocate space for 2 register states: 'current' for the current state of
the hardware, and 'saved', to be used for restoring the hardware to a sane
state. This is in preparation for the addition of state save and restore
hooks to make savagefb work together with the latest Xorg savage driver.
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Signed-off-by: Tobias Oed <tobiasoed@hotmail.com>
Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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The driver pdc202xx_old requires CONFIG_BLK_DEV_IDEDMA, so it's always
defined
Signed-off-by: Tobias Oed <tobiasoed@hotmail.com>
Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Michal Piotrowski reported the following validator assert:
hdd: set_drive_speed_status: status=0x51 { DriveReady SeekComplete Error }
hdd: set_drive_speed_status: error=0xb4 { AbortedCommand LastFailedSense=0x0b }
============================
[ BUG: illegal lock usage! ]
----------------------------
illegal {in-hardirq-W} -> {hardirq-on-W} usage.
hdparm/1821 [HC0[0]:SC0[0]:HE1:SE1] takes:
(ide_lock){++..}, at: [<c0268388>] ide_dump_opcode+0x13/0x9b
[...]
stack backtrace:
[<c0104513>] show_trace+0x1b/0x20
[<c01045f1>] dump_stack+0x1f/0x24
[<c013976c>] print_usage_bug+0x1a5/0x1b1
[<c0139e90>] mark_lock+0x2ca/0x4f7
[<c013aa96>] __lockdep_acquire+0x47e/0xaa4
[<c013b536>] lockdep_acquire+0x67/0x7f
[<c030552d>] _spin_lock+0x24/0x32
[<c0268388>] ide_dump_opcode+0x13/0x9b
[<c02688b6>] ide_dump_status+0x4a6/0x4cc
[<c0267ae6>] ide_config_drive_speed+0x32a/0x33a
[<c0262dc5>] piix_tune_chipset+0x2ed/0x2f8
[<c0262e31>] piix_config_drive_xfer_rate+0x61/0xb5
[<c0263a82>] set_using_dma+0x2f/0x60
[<c0263bee>] ide_write_setting+0x4a/0xc3
[<c02647ca>] generic_ide_ioctl+0x8a/0x47f
[<f886003a>] idecd_ioctl+0xfd/0x133 [ide_cd]
[<c01f1fff>] blkdev_driver_ioctl+0x4b/0x5f
[<c01f2783>] blkdev_ioctl+0x770/0x7bd
[<c017dc0d>] block_ioctl+0x1f/0x21
[<c0189353>] do_ioctl+0x27/0x6e
[<c0189604>] vfs_ioctl+0x26a/0x280
[<c0189667>] sys_ioctl+0x4d/0x7e
[<c0305ed2>] sysenter_past_esp+0x63/0xa1
in ide_dump_opcode() takes the ide_lock in an irq-unsafe manner, i.e. this
function expects to be called with irqs disabled. But
ide_dump_ata[pi]_status() doesnt do that - it enables interrupts specifically.
That is a no-no - what guarantees that another IDE port couldnt generate an
IDE interrupt while we are dumping this error? The fix is to turn the
irq-enabling in these functions into irq-disabling.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Michal Piotrowski <michal.k.k.piotrowski@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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