diff options
| author | Alan Stern <stern@rowland.harvard.edu> | 2026-02-18 06:07:47 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-03-25 13:05:49 +0300 |
| commit | fc26e98b6cb829d50c6736fb57cf13df26e59158 (patch) | |
| tree | 8050491571706e32a4418da4a3903bee6cbb58a3 /include/linux | |
| parent | 2872b67951fe49198464d90de985bfefd51d2e81 (diff) | |
| download | linux-fc26e98b6cb829d50c6736fb57cf13df26e59158.tar.xz | |
USB: usbcore: Introduce usb_bulk_msg_killable()
commit 416909962e7cdf29fd01ac523c953f37708df93d upstream.
The synchronous message API in usbcore (usb_control_msg(),
usb_bulk_msg(), and so on) uses uninterruptible waits. However,
drivers may call these routines in the context of a user thread, which
means it ought to be possible to at least kill them.
For this reason, introduce a new usb_bulk_msg_killable() function
which behaves the same as usb_bulk_msg() except for using
wait_for_completion_killable_timeout() instead of
wait_for_completion_timeout(). The same can be done later for
usb_control_msg() later on, if it turns out to be needed.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Suggested-by: Oliver Neukum <oneukum@suse.com>
Link: https://lore.kernel.org/linux-usb/3acfe838-6334-4f6d-be7c-4bb01704b33d@rowland.harvard.edu/
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
CC: stable@vger.kernel.org
Link: https://patch.msgid.link/248628b4-cc83-4e81-a620-3ce4e0376d41@rowland.harvard.edu
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/usb.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/include/linux/usb.h b/include/linux/usb.h index a21074861f91..a3261427d6e0 100644 --- a/include/linux/usb.h +++ b/include/linux/usb.h @@ -1849,8 +1849,9 @@ extern int usb_control_msg(struct usb_device *dev, unsigned int pipe, extern int usb_interrupt_msg(struct usb_device *usb_dev, unsigned int pipe, void *data, int len, int *actual_length, int timeout); extern int usb_bulk_msg(struct usb_device *usb_dev, unsigned int pipe, - void *data, int len, int *actual_length, - int timeout); + void *data, int len, int *actual_length, int timeout); +extern int usb_bulk_msg_killable(struct usb_device *usb_dev, unsigned int pipe, + void *data, int len, int *actual_length, int timeout); /* wrappers around usb_control_msg() for the most common standard requests */ int usb_control_msg_send(struct usb_device *dev, __u8 endpoint, __u8 request, |