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author | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-01-04 14:23:56 -0500 |
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committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-01-12 12:00:07 -0500 |
commit | a96d627abaac899e8bfaf18fd0578b228c9c752f (patch) | |
tree | 0ea927e4a1acb8f5a11c29642b960309c732c3a9 /sound/oss/audio.c | |
parent | 8605c6844fb9bdf55471bb87c3ac62d44eb34e04 (diff) | |
download | linux-a96d627abaac899e8bfaf18fd0578b228c9c752f.tar.bz2 |
pci: Introduce __pci_reset_function_locked to be used when holding device_lock.
The use case of this is when a driver wants to call FLR when a device
is attached to it using the SysFS "bind" or "unbind" functionality.
The call chain when a user does "bind" looks as so:
echo "0000:01.07.0" > /sys/bus/pci/drivers/XXXX/bind
and ends up calling:
driver_bind:
device_lock(dev); <=== TAKES LOCK
XXXX_probe:
.. pci_enable_device()
...__pci_reset_function(), which calls
pci_dev_reset(dev, 0):
if (!0) {
device_lock(dev) <==== DEADLOCK
The __pci_reset_function_locked function allows the the drivers
'probe' function to call the "pci_reset_function" while still holding
the driver mutex lock.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'sound/oss/audio.c')
0 files changed, 0 insertions, 0 deletions