4.4-stable review patch. If anyone has any objections, please let me know.
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From: Ladislav Michl ladis@linux-mips.org
[ Upstream commit c98769475575c8a585f5b3952f4b5f90266f699b ]
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 Signed-off-by: Sasha Levin alexander.levin@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/video/fbdev/udlfb.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-)
--- a/drivers/video/fbdev/udlfb.c +++ b/drivers/video/fbdev/udlfb.c @@ -769,11 +769,11 @@ static int dlfb_get_edid(struct dlfb_dat
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; }