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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-09-23 15:43:46 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-09-25 16:33:59 +0200 |
| commit | 6d2d427e3b1266c3eab80cdb961c21b9f4fcdadf (patch) | |
| tree | ad734370c7d7d03346256d4d3457ea169056ea3d /sound/usb/line6/podhd.c | |
| parent | d9f0d82f06c6775b3adb9e4925e27377bc87af54 (diff) | |
| download | linux-stable-6d2d427e3b1266c3eab80cdb961c21b9f4fcdadf.tar.gz linux-stable-6d2d427e3b1266c3eab80cdb961c21b9f4fcdadf.tar.bz2 linux-stable-6d2d427e3b1266c3eab80cdb961c21b9f4fcdadf.zip | |
sound: line6: move to use usb_control_msg_send() and usb_control_msg_recv()
The usb_control_msg_send() and usb_control_msg_recv() calls can return
an error if a "short" write/read happens, and they can handle data off
of the stack, so move the driver over to using those calls instead,
saving some logic when dynamically allocating memory.
v2: API change of use usb_control_msg_send() and usb_control_msg_recv()
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Vasily Khoruzhick <anarsoul@gmail.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20200914153756.3412156-9-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20200923134348.23862-13-oneukum@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'sound/usb/line6/podhd.c')
| -rw-r--r-- | sound/usb/line6/podhd.c | 23 |
1 files changed, 9 insertions, 14 deletions
diff --git a/sound/usb/line6/podhd.c b/sound/usb/line6/podhd.c index eef45f7fef0d..28794a35949d 100644 --- a/sound/usb/line6/podhd.c +++ b/sound/usb/line6/podhd.c @@ -183,29 +183,25 @@ static const struct attribute_group podhd_dev_attr_group = { static int podhd_dev_start(struct usb_line6_podhd *pod) { int ret; - u8 *init_bytes; + u8 init_bytes[8]; 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), + ret = usb_control_msg_send(usbdev, 0, 0x67, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT, 0x11, 0, - NULL, 0, LINE6_TIMEOUT * HZ); - if (ret < 0) { + NULL, 0, LINE6_TIMEOUT * HZ, GFP_KERNEL); + if (ret) { dev_err(pod->line6.ifcdev, "read request failed (error %d)\n", ret); goto exit; } /* NOTE: looks like some kind of ping message */ - ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 0x67, + ret = usb_control_msg_recv(usbdev, 0, 0x67, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN, 0x11, 0x0, - init_bytes, 3, LINE6_TIMEOUT * HZ); - if (ret < 0) { + init_bytes, 3, LINE6_TIMEOUT * HZ, GFP_KERNEL); + if (ret) { dev_err(pod->line6.ifcdev, "receive length failed (error %d)\n", ret); goto exit; @@ -220,13 +216,12 @@ static int podhd_dev_start(struct usb_line6_podhd *pod) goto exit; } - ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0), + ret = usb_control_msg_send(usbdev, 0, USB_REQ_SET_FEATURE, USB_TYPE_STANDARD | USB_RECIP_DEVICE | USB_DIR_OUT, 1, 0, - NULL, 0, LINE6_TIMEOUT * HZ); + NULL, 0, LINE6_TIMEOUT * HZ, GFP_KERNEL); exit: - kfree(init_bytes); return ret; } |