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| author | Ladislav Michl <ladis@linux-mips.org> | 2017-11-09 20:09:30 +0300 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> | 2017-11-09 20:09:30 +0300 |
| commit | c98769475575c8a585f5b3952f4b5f90266f699b (patch) | |
| tree | 237dffb6a92e25b7f994dfaf64a37a554210fbfd /drivers/video/fbdev/udlfb.c | |
| parent | 1e7d4beba2f5c8d22c46e15d3b89559934356501 (diff) | |
| download | linux-c98769475575c8a585f5b3952f4b5f90266f699b.tar.xz | |
video: udlfb: Fix read EDID timeout
While usb_control_msg function expects timeout in miliseconds, a value
of HZ is used. Replace it with USB_CTRL_GET_TIMEOUT and also fix error
message which looks like:
udlfb: Read EDID byte 78 failed err ffffff92
as error is either negative errno or number of bytes transferred use %d
format specifier.
Returned EDID is in second byte, so return error when less than two bytes
are received.
Fixes: 18dffdf8913a ("staging: udlfb: enhance EDID and mode handling support")
Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Cc: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Diffstat (limited to 'drivers/video/fbdev/udlfb.c')
| -rw-r--r-- | drivers/video/fbdev/udlfb.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/video/fbdev/udlfb.c b/drivers/video/fbdev/udlfb.c index ef08a104fb42..d44f14242016 100644 --- a/drivers/video/fbdev/udlfb.c +++ b/drivers/video/fbdev/udlfb.c @@ -769,11 +769,11 @@ static int dlfb_get_edid(struct dlfb_data *dev, char *edid, int len) for (i = 0; i < len; i++) { ret = usb_control_msg(dev->udev, - usb_rcvctrlpipe(dev->udev, 0), (0x02), - (0x80 | (0x02 << 5)), i << 8, 0xA1, rbuf, 2, - HZ); - if (ret < 1) { - pr_err("Read EDID byte %d failed err %x\n", i, ret); + usb_rcvctrlpipe(dev->udev, 0), 0x02, + (0x80 | (0x02 << 5)), i << 8, 0xA1, + rbuf, 2, USB_CTRL_GET_TIMEOUT); + if (ret < 2) { + pr_err("Read EDID byte %d failed: %d\n", i, ret); i--; break; } |