diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-28 18:04:11 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2019-04-28 18:40:26 +0200 |
| commit | e5c812e84f0dece3400d5caf42522287e6ef139f (patch) | |
| tree | a462673b1cfe119f0bb6221e5fcc31fbf48cc345 /sound/usb/line6/podhd.c | |
| parent | 0700d3d117a7f110ddddbd83873e13652f69c54b (diff) | |
| download | linux-e5c812e84f0dece3400d5caf42522287e6ef139f.tar.bz2 | |
ALSA: line6: use dynamic buffers
The line6 driver uses a lot of USB buffers off of the stack, which is
not allowed on many systems, causing the driver to crash on some of
them. Fix this up by dynamically allocating the buffers with kmalloc()
which allows for proper DMA-able memory.
Reported-by: Christo Gouws <gouws.christo@gmail.com>
Reported-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Christo Gouws <gouws.christo@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb/line6/podhd.c')
| -rw-r--r-- | sound/usb/line6/podhd.c | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/sound/usb/line6/podhd.c b/sound/usb/line6/podhd.c index 36ed9c85c0eb..5f3c87264e66 100644 --- a/sound/usb/line6/podhd.c +++ b/sound/usb/line6/podhd.c @@ -225,28 +225,32 @@ static void podhd_startup_start_workqueue(struct timer_list *t) static int podhd_dev_start(struct usb_line6_podhd *pod) { int ret; - u8 init_bytes[8]; + u8 *init_bytes; int i; struct usb_device *usbdev = pod->line6.usbdev; + init_bytes = kmalloc(8, GFP_KERNEL); + if (!init_bytes) + return -ENOMEM; + ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0), 0x67, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT, 0x11, 0, NULL, 0, LINE6_TIMEOUT * HZ); if (ret < 0) { dev_err(pod->line6.ifcdev, "read request failed (error %d)\n", ret); - return ret; + goto exit; } /* NOTE: looks like some kind of ping message */ ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 0x67, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN, 0x11, 0x0, - &init_bytes, 3, LINE6_TIMEOUT * HZ); + init_bytes, 3, LINE6_TIMEOUT * HZ); if (ret < 0) { dev_err(pod->line6.ifcdev, "receive length failed (error %d)\n", ret); - return ret; + goto exit; } pod->firmware_version = @@ -255,7 +259,7 @@ static int podhd_dev_start(struct usb_line6_podhd *pod) for (i = 0; i <= 16; i++) { ret = line6_read_data(&pod->line6, 0xf000 + 0x08 * i, init_bytes, 8); if (ret < 0) - return ret; + goto exit; } ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0), @@ -263,10 +267,9 @@ static int podhd_dev_start(struct usb_line6_podhd *pod) USB_TYPE_STANDARD | USB_RECIP_DEVICE | USB_DIR_OUT, 1, 0, NULL, 0, LINE6_TIMEOUT * HZ); - if (ret < 0) - return ret; - - return 0; +exit: + kfree(init_bytes); + return ret; } static void podhd_startup_workqueue(struct work_struct *work) |