Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-26 04:42:12 +00:00
Code Issues Packages Projects Releases Wiki Activity

Staging: rspiusb: Check usb_buffer_map_sg() retval

Browse Source 
usb_buffer_map_sg() may return -1, check this directly.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Reviewed-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Roel Kluin 2009-08-22 19:32:44 +02:00 committed by Greg Kroah-Hartman
parent 77943d31b7
commit 48c8276d7a
1 changed files with 11 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/staging/rspiusb/rspiusb.c
View File

@ -611,6 +611,7 @@ static int MapUserBuffer(struct ioctl_struct *io, struct device_extension *pdx)
int i = 0;
int k = 0;
int err = 0;
int ret;
struct page **maplist_p;
int numPagesRequired;
@ -687,9 +688,16 @@ static int MapUserBuffer(struct ioctl_struct *io, struct device_extension *pdx)
} else {
pdx->sgl[frameInfo][0].length = count;
}
pdx->sgEntries[frameInfo] =
usb_buffer_map_sg(pdx->udev, epAddr, pdx->sgl[frameInfo],
pdx->maplist_numPagesMapped[frameInfo]);
ret = usb_buffer_map_sg(pdx->udev, epAddr, pdx->sgl[frameInfo],
pdx->maplist_numPagesMapped[frameInfo]);
if (ret < 0) {
vfree(maplist_p);
dbg("usb_buffer_map_sg() failed");
return -EINVAL;
}
pdx->sgEntries[frameInfo] = ret;
dbg("number of sgEntries = %d", pdx->sgEntries[frameInfo]);
pdx->userBufMapped = 1;
vfree(maplist_p);
@ -716,8 +724,6 @@ static int MapUserBuffer(struct ioctl_struct *io, struct device_extension *pdx)
pdx->PixelUrb[frameInfo][i]->transfer_flags =
URB_NO_TRANSFER_DMA_MAP | URB_NO_INTERRUPT;
}
if (i == 0)
return -EINVAL;
/* only interrupt when last URB completes */
pdx->PixelUrb[frameInfo][--i]->transfer_flags &= ~URB_NO_INTERRUPT;
pdx->pendedPixelUrbs[frameInfo] =