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staging: most: usb: move allocation of URB out of critical section

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This patch puts the call to usb_alloc_urb() before the critical
section starts that is protected with the io_mutex lock. This is
to make the section as short as possible and to use the regular
GFP_KERNEL flag.

Signed-off-by: Christian Gromm <christian.gromm@microchip.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/1590570387-27069-6-git-send-email-christian.gromm@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Christian Gromm 2020-05-27 11:06:22 +02:00 committed by Greg Kroah-Hartman
parent 2c069b61a8
commit 8bf56cfafa
1 changed files with 5 additions and 7 deletions
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12
drivers/staging/most/usb/usb.c
View file

@ -467,18 +467,16 @@ static int hdm_enqueue(struct most_interface *iface, int channel,
if (iface->num_channels <= channel || channel < 0)
return -ECHRNG;
urb = usb_alloc_urb(NO_ISOCHRONOUS_URB, GFP_KERNEL);
if (!urb)
return -ENOMEM;
conf = &mdev->conf[channel];
mutex_lock(&mdev->io_mutex);
if (!mdev->usb_device) {
retval = -ENODEV;
goto unlock_io_mutex;
}
urb = usb_alloc_urb(NO_ISOCHRONOUS_URB, GFP_ATOMIC);
if (!urb) {
retval = -ENOMEM;
goto unlock_io_mutex;
goto err_free_urb;
}
if ((conf->direction & MOST_CH_TX) && mdev->padding_active[channel] &&