diff options
| author | Ingo Molnar <mingo@elte.hu> | 2009-05-11 09:33:06 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-05-11 09:33:15 +0200 |
| commit | 134cbf35c739bf89c51fd975a33a6b87507482c4 (patch) | |
| tree | c30536dcbb6e99a0f204879bbe5a19bfb27cccf8 /block/scsi_ioctl.c | |
| parent | 2feceeff1e771850e49f9074307f071964fd9e3e (diff) | |
| parent | 091bf7624d1c90cec9e578a18529f615213ff847 (diff) | |
Merge commit 'v2.6.30-rc5' into x86/mm
Merge reason: this branch was on a .30-rc2 base - sync it up with
all the latest fixes.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'block/scsi_ioctl.c')
| -rw-r--r-- | block/scsi_ioctl.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c index 84b7f8709f4..82a0ca2f672 100644 --- a/block/scsi_ioctl.c +++ b/block/scsi_ioctl.c @@ -290,6 +290,7 @@ static int sg_io(struct request_queue *q, struct gendisk *bd_disk, if (hdr->iovec_count) { const int size = sizeof(struct sg_iovec) * hdr->iovec_count; + size_t iov_data_len; struct sg_iovec *iov; iov = kmalloc(size, GFP_KERNEL); @@ -304,8 +305,18 @@ static int sg_io(struct request_queue *q, struct gendisk *bd_disk, goto out; } + /* SG_IO howto says that the shorter of the two wins */ + iov_data_len = iov_length((struct iovec *)iov, + hdr->iovec_count); + if (hdr->dxfer_len < iov_data_len) { + hdr->iovec_count = iov_shorten((struct iovec *)iov, + hdr->iovec_count, + hdr->dxfer_len); + iov_data_len = hdr->dxfer_len; + } + ret = blk_rq_map_user_iov(q, rq, NULL, iov, hdr->iovec_count, - hdr->dxfer_len, GFP_KERNEL); + iov_data_len, GFP_KERNEL); kfree(iov); } else if (hdr->dxfer_len) ret = blk_rq_map_user(q, rq, NULL, hdr->dxferp, hdr->dxfer_len, |