4.15-stable review patch. If anyone has any objections, please let me know.
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From: Jason Yan yanaijie@huawei.com
[ Upstream commit 2b23d9509fd7174b362482cf5f3b5f9a2265bc33 ]
The intend purpose here was to goto out if smp_execute_task() returned error. Obviously something got screwed up. We will never get these link error statistics below:
~:/sys/class/sas_phy/phy-1:0:12 # cat invalid_dword_count 0 ~:/sys/class/sas_phy/phy-1:0:12 # cat running_disparity_error_count 0 ~:/sys/class/sas_phy/phy-1:0:12 # cat loss_of_dword_sync_count 0 ~:/sys/class/sas_phy/phy-1:0:12 # cat phy_reset_problem_count 0
Obviously we should goto error handler if smp_execute_task() returns non-zero.
Fixes: 2908d778ab3e ("[SCSI] aic94xx: new driver") Signed-off-by: Jason Yan yanaijie@huawei.com CC: John Garry john.garry@huawei.com CC: chenqilin chenqilin2@huawei.com CC: chenxiang chenxiang66@hisilicon.com Reviewed-by: Hannes Reinecke hare@suse.com Reviewed-by: Christoph Hellwig hch@lst.de Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/scsi/libsas/sas_expander.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/scsi/libsas/sas_expander.c +++ b/drivers/scsi/libsas/sas_expander.c @@ -686,7 +686,7 @@ int sas_smp_get_phy_events(struct sas_ph res = smp_execute_task(dev, req, RPEL_REQ_SIZE, resp, RPEL_RESP_SIZE);
- if (!res) + if (res) goto out;
phy->invalid_dword_count = scsi_to_u32(&resp[12]);