redonkable
/
remarkable-linux
1
0
Fork 0
Code Releases Activity

sg_start_req(): use import_iovec() 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
wifi-calibration
Al Viro 2015-03-21 20:25:30 -04:00
parent 451a2886b6
commit fdc81f45e9
1 changed files with 5 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/scsi/sg.c
View File

@ -1744,21 +1744,15 @@ sg_start_req(Sg_request *srp, unsigned char *cmd)
md->from_user = 0;
}
if (unlikely(iov_count > MAX_UIOVEC))
return -EINVAL;
if (iov_count) {
int size = sizeof(struct iovec) * iov_count;
struct iovec *iov;
struct iovec *iov = NULL;
struct iov_iter i;
iov = memdup_user(hp->dxferp, size);
if (IS_ERR(iov))
return PTR_ERR(iov);
res = import_iovec(rw, hp->dxferp, iov_count, 0, &iov, &i);
if (res < 0)
return res;
iov_iter_init(&i, rw, iov, iov_count,
min_t(size_t, hp->dxfer_len,
iov_length(iov, iov_count)));
iov_iter_truncate(&i, hp->dxfer_len);
res = blk_rq_map_user_iov(q, rq, md, &i, GFP_ATOMIC);
kfree(iov);