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path: root/drivers/firewire/fw-device.c
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2008-01-30firewire: fw-core: react on bus resets while the config ROM is being fetchedStefan Richter
read_rom() obtained a fresh new fw_device.generation for each read transaction. Hence it was able to continue reading in the middle of the ROM even if a bus reset happened. However the device may have modified the ROM during the reset. We would end up with a corrupt fetched ROM image then. Although all of this is quite unlikely, it is not impossible. Therefore we now restart reading the ROM if the bus generation changed. Note, the memory barrier in read_rom() is still necessary according to tests by Jarod Wilson, despite of the ->generation access being moved up in the call chain. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> This is essentially what I've been beating on locally, and I've yet to hit another config rom read failure with it. Signed-off-by: Jarod Wilson <jwilson@redhat.com>
2008-01-30firewire: enforce access order between generation and node ID, fix "giving ↵Stefan Richter
up on config rom" fw_device.node_id and fw_device.generation are accessed without mutexes. We have to ensure that all readers will get to see node_id updates before generation updates. Fixes an inability to recognize devices after "giving up on config rom", https://bugzilla.redhat.com/show_bug.cgi?id=429950 Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Reviewed by Nick Piggin <nickpiggin@yahoo.com.au>. Verified to fix 'giving up on config rom' issues on multiple system and drive combinations that were previously affected. Signed-off-by: Jarod Wilson <jwilson@redhat.com> Signed-off-by: Kristian Høgsberg <krh@redhat.com>
2007-10-12Driver core: change add_uevent_var to use a structKay Sievers
This changes the uevent buffer functions to use a struct instead of a long list of parameters. It does no longer require the caller to do the proper buffer termination and size accounting, which is currently wrong in some places. It fixes a known bug where parts of the uevent environment are overwritten because of wrong index calculations. Many thanks to Mathieu Desnoyers for finding bugs and improving the error handling. Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-07-10firewire: support S100B...S400B and link slower than PHYStefan Richter
Use a speed probe to determine the speed over 1394b buses and of nodes which report a link speed less than their PHY speed. Log the effective maximum speed of newly created nodes in dmesg. Also, read the config ROM (except bus info block) at the maximum speed rather than S100. This isn't a real optimization though because we still only use quadlet read requests for the entire ROM. The patch also adds support for S1600 and S3200, although such hardware does not exist yet. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Kristian Høgsberg <krh@redhat.com>
2007-05-10firewire: Always use parens with sizeof.Kristian Høgsberg
Signed-off-by: Kristian Hoegsberg <krh@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-05-10firewire: Clean up comment style.Kristian Høgsberg
Drop filenames from file preamble, drop editor annotations and use standard indent style for block comments. Signed-off-by: Kristian Hoegsberg <krh@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (fixed typo)
2007-04-27firewire: don't use extern on public symbolsRandy Dunlap
Make firewire entry points not 'extern': drivers/firewire/fw-device.c:160:25: warning: function 'fw_device_get' with external linkage has definition drivers/firewire/fw-device.c:167:13: warning: function 'fw_device_put' with external linkage has definition Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-04-27firewire: fw-device printk fixAndrew Morton
You don't know what type is used to implement u64. Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-04-17firewire: Don't use subsystem rwsem, it's going away.Kristian Høgsberg
Signed-off-by: Kristian Høgsberg <krh@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-28firewire: Increase the number of config rom retries and the retry delay.Kristian Høgsberg
Some devices have a really long power-on cycle, and we fail to successfully probe these if they're plugged in and then turned on. There's really no down-side to bumping the number of retries and the retry delay, and most devices will get picked up within the first couple of retries anyway. Signed-off-by: Kristian Høgsberg <krh@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-28firewire: Use device->groups for adding device attributes.Kristian Høgsberg
We dynamically create an attribute group for the key present on the device in hand and point device->group to it. This way the device core adds the sysfs attributes for us as the device is added. Signed-off-by: Kristian Høgsberg <krh@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-22firewire: Export GUID as sysfs attribute.Kristian Høgsberg
Signed-off-by: Kristian Høgsberg <krh@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-22firewire: Add sysfs attributes for config rom directory values.Kristian Høgsberg
We export the entire config rom, so this is technically redundant, but should make udev rules and HAL integration easier. Signed-off-by: Kristian Høgsberg <krh@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-22firewire: Make use of struct device_type.Kristian Høgsberg
The device_type struct is useful for setting attributes for a device and overriding .release and .uevent for a group of devices. This patch uses it this way to clean up the sysfs code a bit. Signed-off-by: Kristian Høgsberg <krh@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-20firewire: fix compiler warnings on 64bitStefan Richter
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Kristian Høgsberg <krh@redhat.com>
2007-03-20firewire: add includes for sem and rw_semStefan Richter
as a precaution. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-20firewire: Grab dev->sem when doing the update callback.Kristian Høgsberg
This serializes the update callback with the probe and remove callback from the driver core and prevents remove from being called while update is running for the same device. Signed-off-by: Kristian Høgsberg <krh@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09firewire: Use only a wait queue and terminate poll and read on device removal.Kristian Høgsberg
Drop the event list semaphore and only use the wait queue and the list to synchronize queue access. Break out of a poll or read whenever the device is disconnected. Signed-off-by: Kristian Høgsberg <krh@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09firewire: Add rom_index attribute for unit sysfs directories.Kristian Høgsberg
Signed-off-by: Kristian Høgsberg <krh@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09firewire: Switch cdev code over to use register_chrdev and keep a list of ↵Kristian Høgsberg
devices. The old mechanism kept a struct cdev for each fw device, but fops->release would reference this struct after the device got freed in some cases. Signed-off-by: Kristian Høgsberg <krh@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09firewire: Add a bus reset event type for fw-device-cdev.Kristian Høgsberg
Signed-off-by: Kristian Høgsberg <krh@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09firewire: Iterate through units in a keventd callback for update callbacks.Kristian Høgsberg
We can't take the klist lock for the child device list in interrupt context. Signed-off-by: Kristian Høgsberg <krh@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09firewire: adjust whitespaceStefan Richter
Remove space before tab and trailing whitespace. Unify indentation of goto target labels. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09firewire: Use atomic_t's for serial numbers.Kristian Høgsberg
Signed-off-by: Kristian Høgsberg <krh@redhat.com> Use atomic_inc_return. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09firewire: Spell out fw as firewire in sysfs.Kristian Høgsberg
Signed-off-by: Kristian Høgsberg <krh@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09firewire: use atomic type for fw_device.stateStefan Richter
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09firewire: Implement compliant bus management.Kristian Høgsberg
Signed-off-by: Kristian Høgsberg <krh@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09firewire: Loop requests to the host controller back into the stack.Kristian Høgsberg
Signed-off-by: Kristian Høgsberg <krh@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09firewire: consistent usage of node_idStefan Richter
Definitions as per IEEE 1212 and IEEE 1394: Node ID: Concatenation of bus ID and local ID. 16 bits long. Bus ID: Identifies a particular bus within a group of buses interconnected by bus bridges. Local ID: Identifies a particular node on a bus. PHY ID: Local ID of IEEE 1394 nodes. 6 bits long. Never ever use a variable called node_id for anything else than a node ID. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09firewire: comma after last enum item or initializerStefan Richter
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Kristian Høgsberg <krh@redhat.com>
2007-03-09firewire: whitespace adjustmentsStefan Richter
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Kristian Høgsberg <krh@redhat.com>
2007-03-09firewire: mark some structs constStefan Richter
Instances of struct file_operations and struct fw_card_driver can be qualified as "const". Ditto with struct fw_descriptor.data, struct fw_device_id, and predefined instances of struct fw_address_region, at least in the current implementation. Data qualified as const is placed into the .rodata section which won't be mixed with dirty data. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09firewire: Add device probing and sysfs integration.Kristian Høgsberg
Signed-off-by: Kristian Høgsberg <krh@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
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