diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2019-03-22 17:25:03 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-06-11 13:24:05 +0300 |
| commit | 9effa38946b6b6ff6e1cf9ae5da6e6162d769b69 (patch) | |
| tree | a9187d4f5793cb39338a870501bbf17b1913295f | |
| parent | 95f0bb0a6c839f3562c02212da5c54af1800e02b (diff) | |
| download | linux-9effa38946b6b6ff6e1cf9ae5da6e6162d769b69.tar.xz | |
scsi: qla4xxx: avoid freeing unallocated dma memory
[ Upstream commit 608f729c31d4caf52216ea00d20092a80959256d ]
Clang -Wuninitialized notices that on is_qla40XX we never allocate any DMA
memory in get_fw_boot_info() but attempt to free it anyway:
drivers/scsi/qla4xxx/ql4_os.c:5915:7: error: variable 'buf_dma' is used uninitialized whenever 'if' condition is false
[-Werror,-Wsometimes-uninitialized]
if (!(val & 0x07)) {
^~~~~~~~~~~~~
drivers/scsi/qla4xxx/ql4_os.c:5985:47: note: uninitialized use occurs here
dma_free_coherent(&ha->pdev->dev, size, buf, buf_dma);
^~~~~~~
drivers/scsi/qla4xxx/ql4_os.c:5915:3: note: remove the 'if' if its condition is always true
if (!(val & 0x07)) {
^~~~~~~~~~~~~~~~~~~
drivers/scsi/qla4xxx/ql4_os.c:5885:20: note: initialize the variable 'buf_dma' to silence this warning
dma_addr_t buf_dma;
^
= 0
Skip the call to dma_free_coherent() here.
Fixes: 2a991c215978 ("[SCSI] qla4xxx: Boot from SAN support for open-iscsi")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/scsi/qla4xxx/ql4_os.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c index c158967b59d7..d220b4f691c7 100644 --- a/drivers/scsi/qla4xxx/ql4_os.c +++ b/drivers/scsi/qla4xxx/ql4_os.c @@ -5939,7 +5939,7 @@ static int get_fw_boot_info(struct scsi_qla_host *ha, uint16_t ddb_index[]) val = rd_nvram_byte(ha, sec_addr); if (val & BIT_7) ddb_index[1] = (val & 0x7f); - + goto exit_boot_info; } else if (is_qla80XX(ha)) { buf = dma_alloc_coherent(&ha->pdev->dev, size, &buf_dma, GFP_KERNEL); |