diff options
| author | Johannes Thumshirn <jthumshirn@suse.de> | 2017-07-17 15:11:42 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-03-22 09:18:01 +0100 |
| commit | cbdcbd909efe41bbb10b7c15ff1ff15c1b4971a0 (patch) | |
| tree | 84ea8891a4634eaa0f8e9163a644db2bacbf5522 | |
| parent | 691db1857ee784f026e4d2c267229db4885494ad (diff) | |
scsi: sg: fix static checker warning in sg_is_valid_dxfer
commit 14074aba4bcda3764c9a702b276308b89901d5b6 upstream.
dxfer_len is an unsigned int and we always assign a value > 0 to it, so
it doesn't make any sense to check if it is < 0. We can't really check
dxferp as well as we have both NULL and not NULL cases in the possible
call paths.
So just return true for SG_DXFER_FROM_DEV transfer in
sg_is_valid_dxfer().
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Reported-by: Colin Ian King <colin.king@canonical.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/scsi/sg.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c index 1536f143566d..638d11d9262f 100644 --- a/drivers/scsi/sg.c +++ b/drivers/scsi/sg.c @@ -759,8 +759,11 @@ static bool sg_is_valid_dxfer(sg_io_hdr_t *hp) return false; return true; case SG_DXFER_FROM_DEV: - if (hp->dxfer_len < 0) - return false; + /* + * for SG_DXFER_FROM_DEV we always set dxfer_len to > 0. dxferp + * can either be NULL or != NULL so there's no point in checking + * it either. So just return true. + */ return true; case SG_DXFER_TO_DEV: case SG_DXFER_TO_FROM_DEV: |