3.16.74-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: Arnd Bergmann <a...@arndb.de>
commit 608f729c31d4caf52216ea00d20092a80959256d upstream.
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 <a...@arndb.de>
Reviewed-by: Nathan Chancellor <natechancel...@gmail.com>
Signed-off-by: Martin K. Petersen <martin.peter...@oracle.com>
Signed-off-by: Ben Hutchings <b...@decadent.org.uk>
---
drivers/scsi/qla4xxx/ql4_os.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/scsi/qla4xxx/ql4_os.c
+++ b/drivers/scsi/qla4xxx/ql4_os.c
@@ -5923,7 +5923,7 @@ static int get_fw_boot_info(struct scsi_
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);
