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| author | Johannes Thumshirn <jthumshirn@suse.de> | 2017-07-17 15:11:42 +0200 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2017-07-18 05:03:48 +0200 |
| commit | 14074aba4bcda3764c9a702b276308b89901d5b6 (patch) | |
| tree | e5ecc2155d58096e0b960287b13c1a3d1472bafd | |
| parent | scsi: smartpqi: limit transfer length to 1MB (diff) | |
| download | linux-14074aba4bcda3764c9a702b276308b89901d5b6.tar.xz linux-14074aba4bcda3764c9a702b276308b89901d5b6.zip | |
scsi: sg: fix static checker warning in sg_is_valid_dxfer
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>
| -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 1e82d4128a84..4fe606b000b4 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: |