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| author | Franck Bui-Huu <vagabon.xyz@gmail.com> | 2006-05-15 19:23:53 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-06-21 15:04:12 -0700 |
| commit | caa2a1226741e023a103e091a7f6dce7c42e82ee (patch) | |
| tree | 95a9552242797efd04bd752ab5f07963d837805a /drivers/usb/misc | |
| parent | c8155cc5d839838f8425dbea568fc537337176a7 (diff) | |
| download | linux-caa2a1226741e023a103e091a7f6dce7c42e82ee.tar.gz linux-caa2a1226741e023a103e091a7f6dce7c42e82ee.tar.bz2 linux-caa2a1226741e023a103e091a7f6dce7c42e82ee.zip | |
[PATCH] Fix a deadlock in usbtest
ctrl_complete functions acquires ctx->lock and tries to unlink
all queued urbs in case of errors through usb_unlink_urb func.
In its turn usb_unlink_urb calls, through the hcd driver,
usb_hcd_giveback_urb which calls ctrl_complete again. At this
time, ctx->lock is already taken by the same function.
Signed-off-by: Franck Bui-Huu <vagabon.xyz@gmail.com>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/misc')
| -rw-r--r-- | drivers/usb/misc/usbtest.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c index ccc5e8238bd8..b42ae6bfb12b 100644 --- a/drivers/usb/misc/usbtest.c +++ b/drivers/usb/misc/usbtest.c @@ -802,7 +802,9 @@ error: if (u == urb || !u->dev) continue; + spin_unlock(&ctx->lock); status = usb_unlink_urb (u); + spin_lock(&ctx->lock); switch (status) { case -EINPROGRESS: case -EBUSY: |