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No idea if this platform actually uses cpufreq_get(), but it doesn't
have any cpufreq drivers. That's not to say it doesn't use cpufreq_get()
in its drivers. LH7a40x is unmaintained anyhow, and should probably
be killed off.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Fix:
arch/arm/mach-sa1100/generic.c:117: error: redefinition of 'cpufreq_get'
include/linux/cpufreq.h:299: error: previous definition of 'cpufreq_get' was here
cpufreq_get() is used on these platforms to tell drivers what the CPU
frequency is, and therefore the bus frequency - which is critical for
setting the PCMCIA and LCD timings. Adding ifdefs to these drivers to
select cpufreq_get() or some other interface adds confusion. Making
these drivers use some other interface for the normal paths and cpufreq
stuff for the cpufreq notifier is insane as well.
(Why x86 can't provide a version of cpufreq_get() which returns the
CPU frequency when CPUFREQ is disabled is beyond me, rather than
requiring a dummy zero-returning cpufreq_get(). Especially as they
do:
unsigned long khz = cpufreq_get(cpu);
if (!khz)
khz = tsc_khz;
In other words, if CPUFREQ is disabled, get it from tsc_khz - why
not provide a dummy cpufreq_get() which returns tsc_khz?)
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Anders Grafström reports that footbridge fails to build after 1c4a4f4.
Fix this by adding the necessary definitions for __pfn_to_bus and
__bus_to_pfn.
Reported-by: Anders Grafström <anders.grafstrom@netinsight.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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When the VFP notifier is called for flush_thread(), we may be
preemptible, meaning we might migrate to another CPU, which means
referencing the current CPU number without some form of locking is
invalid, and can cause data corruption.
For the most cases, this isn't a problem since atomic notifiers are run
under rcu lock, which for most configurations results in preemption
being disabled - except when the preemptable tree-based rcu
implementation is selected.
Let's make it safe anyway.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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commit 66024db removes all other references of skt->irq by using
skt->socket.pci_irq, while leaving these two missed. Get them fixed.
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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ERROR: "pxa2xx_drv_pcmcia_ops" [drivers/pcmcia/pxa2xx_lubbock_cs.ko] undefined!
ERROR: "pxa2xx_drv_pcmcia_add_one" [drivers/pcmcia/pxa2xx_lubbock_cs.ko] undefined!
We also remove __pxa2xx_drv_pcmcia_probe and its export, since this is
no longer required.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (75 commits)
net: Handle NETREG_UNINITIALIZED devices correctly
can: add the driver for Analog Devices Blackfin on-chip CAN controllers
xfrm: Fix truncation length of authentication algorithms installed via PF_KEY
net: use compat helper functions in compat_sys_recvmmsg
net: fix compat_sys_recvmmsg parameter type
cxgb3: Fixing EEH handlers
cnic: Zero out status block and Event Queue indices.
cnic: Send delete command when shutting down iSCSI ring.
net: smc91x: Fix up type mismatch in smc_drv_resume().
smc91x: fix unused flags warnings on UP systems
MAINTAINERS: Transfering maintainership of cdc-ether
net: Add missing TST_CFG_WRITE bits around sky2_pci_write
net: Fix Yukon-2 Optima TCP offload setup
net: niu uses crc32, so select CRC32
wireless: update old static regulatory domain rules
mac80211: Revert 'Use correct sign for mesh active path refresh'
mac80211: Fixed bug in mesh portal paths
net/mac80211: Correct size given to memset
b43: Remove reset after fatal DMA error
rtl8187: add radio led and fix warnings on suspend
...
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git://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground
* 'compat-ioctl-merge' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground:
usbdevfs: move compat_ioctl handling to devio.c
lp: move compat_ioctl handling into lp.c
compat_ioctl: pass compat pointer directly to handlers
compat_ioctl: simplify lookup table
compat_ioctl: simplify calling of handlers
compat_ioctl: inline all conversion handlers
compat_ioctl: Remove BKL
compat_ioctl: remove all VT ioctl handling
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* git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
asm-generic: add sys_recvmmsg to unistd.h
asm-generic: add sys_accept4 to unistd.h
asm-generic/gpio.h: add some forward decls of the device struct
asm-generic: Fix typo in asm-generic/unistd.h.
lib/checksum: fix one more thinko
lib/checksum.c: make do_csum optional
lib/checksum.c: use 32-bit arithmetic consistently
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
itimer: Fix the itimer trace print format
hrtimer: move timer stats helper functions to hrtimer.c
hrtimer: Tune hrtimer_interrupt hang logic
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
lockdep: Avoid out of bounds array reference in save_trace()
futex: Take mmap_sem for get_user_pages in fault_in_user_writeable
lockstat: Add usage info to Documentation/lockstat.txt
lockstat: Fix min, max times in /proc/lock_stats
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86/amd-iommu: Fix PCI hotplug with passthrough mode
x86/amd-iommu: Fix passthrough mode
x86: mmio-mod.c: Use pr_fmt
x86: kmmio.c: Add and use pr_fmt(fmt)
x86: i8254.c: Add pr_fmt(fmt)
x86: setup_percpu.c: Use pr_<level> and add pr_fmt(fmt)
x86: es7000_32.c: Use pr_<level> and add pr_fmt(fmt)
x86: Print DMI_BOARD_NAME as well as DMI_PRODUCT_NAME from __show_regs()
x86: Factor duplicated code out of __show_regs() into show_regs_common()
arch/x86/kernel/microcode*: Use pr_fmt() and remove duplicated KERN_ERR prefix
x86, mce: fix confusion between bank attributes and mce attributes
x86/mce: Set up timer unconditionally
x86: Fix bogus warning in apic_noop.apic_write()
x86: Fix typo in arch/x86/mm/kmmio.c
x86: ASUS P4S800 reboot=bios quirk
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
tracing: Remove comparing of NULL to va_list in trace_array_vprintk()
tracing: Fix function graph trace_pipe to properly display failed entries
tracing: Add full state to trace_seq
tracing: Buffer the output of seq_file in case of filled buffer
tracing: Only call pipe_close if pipe_close is defined
tracing: Add pipe_close interface
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (57 commits)
x86, perf events: Check if we have APIC enabled
perf_event: Fix variable initialization in other codepaths
perf kmem: Fix unused argument build warning
perf symbols: perf_header__read_build_ids() offset'n'size should be u64
perf symbols: dsos__read_build_ids() should read both user and kernel buildids
perf tools: Align long options which have no short forms
perf kmem: Show usage if no option is specified
sched: Mark sched_clock() as notrace
perf sched: Add max delay time snapshot
perf tools: Correct size given to memset
perf_event: Fix perf_swevent_hrtimer() variable initialization
perf sched: Fix for getting task's execution time
tracing/kprobes: Fix field creation's bad error handling
perf_event: Cleanup for cpu_clock_perf_event_update()
perf_event: Allocate children's perf_event_ctxp at the right time
perf_event: Clean up __perf_event_init_context()
hw-breakpoints: Modify breakpoints without unregistering them
perf probe: Update perf-probe document
perf probe: Support --del option
trace-kprobe: Support delete probe syntax
...
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* 'for-linus' of git://codeaurora.org/quic/kernel/dwalker/linux-msm:
HTC Dream: mmc compilation fixes
video: Allow selecting MSM framebuffer in Kconfig
Add arm msm maintainer entry
msm: Add memory map for HTC Dream
msm: add minimal board file for HTC Dream device
msm: make debugging UART (for DEBUG_LL) configurable
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Conflicts:
include/net/tcp.h
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git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq:
[ACPI/CPUFREQ] Introduce bios_limit per cpu cpufreq sysfs interface
[CPUFREQ] make internal cpufreq_add_dev_* static
[CPUFREQ] use an enum for speedstep processor identification
[CPUFREQ] Document units for transition latency
[CPUFREQ] Use global sysfs cpufreq structure for conservative governor tunings
[CPUFREQ] Documentation: ABI: /sys/devices/system/cpu/cpu#/cpufreq/
[CPUFREQ] powernow-k6: set transition latency value so ondemand governor can be used
[CPUFREQ] cpumask: don't put a cpumask on the stack in x86...cpufreq/powernow-k8.c
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The debug batman option needs to depend on the correct
config option.
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
[ "No means no!" - Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6: (58 commits)
tty: split the lock up a bit further
tty: Move the leader test in disassociate
tty: Push the bkl down a bit in the hangup code
tty: Push the lock down further into the ldisc code
tty: push the BKL down into the handlers a bit
tty: moxa: split open lock
tty: moxa: Kill the use of lock_kernel
tty: moxa: Fix modem op locking
tty: moxa: Kill off the throttle method
tty: moxa: Locking clean up
tty: moxa: rework the locking a bit
tty: moxa: Use more tty_port ops
tty: isicom: fix deadlock on shutdown
tty: mxser: Use the new locking rules to fix setserial properly
tty: mxser: use the tty_port_open method
tty: isicom: sort out the board init logic
tty: isicom: switch to the new tty_port_open helper
tty: tty_port: Add a kref object to the tty port
tty: istallion: tty port open/close methods
tty: stallion: Convert to the tty_port_open/close methods
...
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git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6: (21 commits)
ext3: PTR_ERR return of wrong pointer in setup_new_group_blocks()
ext3: Fix data / filesystem corruption when write fails to copy data
ext4: Support for 64-bit quota format
ext3: Support for vfsv1 quota format
quota: Implement quota format with 64-bit space and inode limits
quota: Move definition of QFMT_OCFS2 to linux/quota.h
ext2: fix comment in ext2_find_entry about return values
ext3: Unify log messages in ext3
ext2: clear uptodate flag on super block I/O error
ext2: Unify log messages in ext2
ext3: make "norecovery" an alias for "noload"
ext3: Don't update the superblock in ext3_statfs()
ext3: journal all modifications in ext3_xattr_set_handle
ext2: Explicitly assign values to on-disk enum of filetypes
quota: Fix WARN_ON in lookup_one_len
const: struct quota_format_ops
ubifs: remove manual O_SYNC handling
afs: remove manual O_SYNC handling
kill wait_on_page_writeback_range
vfs: Implement proper O_SYNC semantics
...
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* 'for-linus' of git://oss.sgi.com/xfs/xfs:
xfs: Fix error return for fallocate() on XFS
xfs: cleanup dmapi macros in the umount path
xfs: remove incorrect sparse annotation for xfs_iget_cache_miss
xfs: kill the STATIC_INLINE macro
xfs: uninline xfs_get_extsz_hint
xfs: rename xfs_attr_fetch to xfs_attr_get_int
xfs: simplify xfs_buf_get / xfs_buf_read interfaces
xfs: remove IO_ISAIO
xfs: Wrapped journal record corruption on read at recovery
xfs: cleanup data end I/O handlers
xfs: use WRITE_SYNC_PLUG for synchronous writeout
xfs: reset the i_iolock lock class in the reclaim path
xfs: I/O completion handlers must use NOFS allocations
xfs: fix mmap_sem/iolock inversion in xfs_free_eofblocks
xfs: simplify inode teardown
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* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6: (235 commits)
Staging: IIO: add selection of IIO_SW_RING to LIS3L02DQ as needed
Staging: IIO: Add tsl2560-2 support to tsl2563 driver.
Staging: IIO: Remove tsl2561 driver. Support merged with tsl2563.
Staging: wlags49_h2: fix up signal levels
+ drivers-staging-wlags49_h2-remove-cvs-metadata.patch added to -mm tree
Staging: samsung-laptop: add TODO file
Staging: samsung-laptop: remove old kernel code
Staging: add Samsung Laptop driver
staging: batman-adv meshing protocol
Staging: rtl8192u: depends on USB
Staging: rtl8192u: remove dead code
Staging: rtl8192u: remove bad whitespaces
Staging: rtl8192u: make it compile
Staging: Added Realtek rtl8192u driver to staging
Staging: dream: add gpio and pmem support
Staging: dream: add TODO file
Staging: android: delete android drivers
Staging: et131x: clean up the avail fields in the rx registers
Staging: et131x: Clean up number fields
Staging: et131x: kill RX_DMA_MAX_PKT_TIME
...
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* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6: (27 commits)
Driver core: fix race in dev_driver_string
Driver Core: Early platform driver buffer
sysfs: sysfs_setattr remove unnecessary permission check.
sysfs: Factor out sysfs_rename from sysfs_rename_dir and sysfs_move_dir
sysfs: Propagate renames to the vfs on demand
sysfs: Gut sysfs_addrm_start and sysfs_addrm_finish
sysfs: In sysfs_chmod_file lazily propagate the mode change.
sysfs: Implement sysfs_getattr & sysfs_permission
sysfs: Nicely indent sysfs_symlink_inode_operations
sysfs: Update s_iattr on link and unlink.
sysfs: Fix locking and factor out sysfs_sd_setattr
sysfs: Simplify iattr time assignments
sysfs: Simplify sysfs_chmod_file semantics
sysfs: Use dentry_ops instead of directly playing with the dcache
sysfs: Rename sysfs_d_iput to sysfs_dentry_iput
sysfs: Update sysfs_setxattr so it updates secdata under the sysfs_mutex
debugfs: fix create mutex racy fops and private data
Driver core: Don't remove kobjects in device_shutdown.
firmware_class: make request_firmware_nowait more useful
Driver-Core: devtmpfs - set root directory mode to 0755
...
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* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (122 commits)
USB: mos7840: add device IDs for B&B electronics devices
USB: ftdi_sio: add USB device ID's for B&B Electronics line
USB: musb: musb_host: fix sparse warning
USB: musb: musb_gadget: fix sparse warning
USB: musb: omap2430: fix sparse warning
USB: core: message: fix sparse warning
USB: core: hub: fix sparse warning
USB: core: fix sparse warning for static function
USB: Added USB_ETH_RNDIS to use instead of CONFIG_USB_ETH_RNDIS
USB: Check bandwidth when switching alt settings.
USB: Refactor code to find alternate interface settings.
USB: xhci: Fix command completion after a drop endpoint.
USB: xhci: Make reverting an alt setting "unfailable".
USB: usbtmc: Use usb_clear_halt() instead of custom code.
USB: xhci: Add correct email and files to MAINTAINERS entry.
USB: ehci-omap.c: introduce missing kfree
USB: xhci-mem.c: introduce missing kfree
USB: add remove_id sysfs attr for usb drivers
USB: g_multi kconfig: fix depends and help text
USB: option: add pid for ZTE
...
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git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6:
firewire: ohci: handle receive packets with a data length of zero
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git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb:
kgdb: Always process the whole breakpoint list on activate or deactivate
kgdb: continue and warn on signal passing from gdb
kgdb,x86: do not set kgdb_single_step on x86
kgdb: allow for cpu switch when single stepping
kgdb,i386: Fix corner case access to ss with NMI watch dog exception
kgdb: Replace strstr() by strchr() for single-character needles
kgdbts: Read buffer overflow
kgdb: Read buffer overflow
kgdb,x86: remove redundant test
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The tty count sanity check may need the BKL, that isn't clear. However it
is clear that the count use of the lock is internal and independant of the
bigger use of the lock.
Furthermore the file list locking is also separately locked already
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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There are two call points, both want to check that tty->signal->leader is
set. Move the test into disassociate_ctty() as that will make locking
changes easier in a bit
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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We know that the redirect field is handled via its own locking in all
places
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Start trying to untangle the remaining BKL mess
Updated to fix missing unlock_kernel noted by Dan Carpenter
Signed-off-by: Alan "I must be out of my tree" Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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moxa_openlock is used for several situations where we want to handle the
case of an ioctl that crosses many ports (not just the open tty), and also
cases where an open races a deinit (eg a pci unplug) and we hangup a port
before we can cope with that.
The non open race cases can use the moxa_lock spinlock. This simplifies sorting
out the remaining mess.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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It isn't needed here any more
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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This is overkill and mostly not needed
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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The tty flag can be tested so the shadow flag isn't needed
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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- The open lock is needed to fix up the case of a board reset occuring during
tty open but too early for a sane hangup response.
- The lock can however got for other cases
- Use the port mutex for get/setserial
- Fix up the confused lack of locking on the THROTTLE and other bits in the
private flags. Just use set/test/clear bit and it covers the cases we need
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Introduce a lock for moxafunc() to protect the cases where were get collisions
between two function requests at the same time.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Rework a few bits of this into tty_port format
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Alexander Strakh <strakh@ispras.ru> reported
KERNEL_VERSION: 2.6.31
DESCRIBE:
Driver drivers/char/isicom.c might sleep in atomic context, because it
calls
tty_port_xmit_buf under spin_lock.
./drivers/char/isicom.c:
1307 static void isicom_hangup(struct tty_struct *tty)
1308 {
...
1315 spin_lock_irqsave(&port->card->card_lock, flags);
1316 isicom_shutdown_port(port);
...
Path to might_sleep macro from isicom_hangup:
1. isicom_hangup calls spin_lock_irqsave (drivers/char/isicom.c:1315) and
then
calls isicom_shutdown_port.
2. isiscom_shutdown_port calls tty_port_free_xmit_buf at
drivers/char/isicom.c:906
3. tty_port_free_xmit_buf calls mutex_lock at drivers/char/tty_port:48
Found by Linux Driver Verification Project.
Reported-by: Alexander Strakh <strakh@ispras.ru>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Propogate the init/shutdown mutex through the setserial logic. Use the proper
locks for the various bits still using the BKL. Kill the BKL in this driver.
Updated to fix the bug noted by Dan Carpenter
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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At first this looks a fairly trivial conversion but we can't quite push
everything into the right format yet. The open side is easy but care is needed
over the setserial methods. Fix up the locking now that we've adopted the
port->mutex locking rule for the initialization.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Split this into two flags - INIT meaning the board is set up and ACTIVE
meaning the board has ports open. Remove the broken HUPCL casing and push
the counts somewhere sensible.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Trivial conversion in this case so might as well do it while testing the
port_open design is right
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Users of tty port need a way to refcount ports when hotplugging is
involved.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Slice/dice/repeat as with the stallion driver this is just code shuffling
and removal
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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The driver is already structured this way so just slice and dice
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Some devices want to set IO_ERROR in their activate methods so that you can
be handed a 'dead' port for operations like setserial. Thus we need to
clear the flag before activate so that activate can choose to set the flag
and still return 0.
This is fine as the file handle/tty are not accessible to the user yet.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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To propogate tty_port_open/close to a few other devices we need to start
handling the IO_ERROR flag on the tty. We can do this pretty trivially.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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We want to be able to do this without regard for the activate/own open
method being used which causes a problem using port->mutex. Add another
mutex for now. Once everything uses port_open to do buffer allocs we can
kill it back off
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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