From: Nicholas Bellinger Date: Tue, 11 Apr 2017 23:24:16 +0000 (-0700) Subject: target: Fix compare_and_write_callback handling for non GOOD status X-Git-Tag: v4.12-rc1~10^2~8 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=a71a5dc7f833943998e97ca8fa6a4c708a0ed1a9;p=karo-tx-linux.git target: Fix compare_and_write_callback handling for non GOOD status Following the bugfix for handling non SAM_STAT_GOOD COMPARE_AND_WRITE status during COMMIT phase in commit 9b2792c3da1, the same bug exists for the READ phase as well. This would manifest first as a lost SCSI response, and eventual hung task during fabric driver logout or re-login, as existing shutdown logic waited for the COMPARE_AND_WRITE se_cmd->cmd_kref to reach zero. To address this bug, compare_and_write_callback() has been changed to set post_ret = 1 and return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE as necessary to signal failure status. Reported-by: Bill Borsari Cc: Bill Borsari Tested-by: Gary Guo Cc: Gary Guo Cc: # v4.1+ Signed-off-by: Nicholas Bellinger --- diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c index f9250b3c3fd4..a0ad618f1b1a 100644 --- a/drivers/target/target_core_sbc.c +++ b/drivers/target/target_core_sbc.c @@ -507,8 +507,11 @@ static sense_reason_t compare_and_write_callback(struct se_cmd *cmd, bool succes * been failed with a non-zero SCSI status. */ if (cmd->scsi_status) { - pr_err("compare_and_write_callback: non zero scsi_status:" + pr_debug("compare_and_write_callback: non zero scsi_status:" " 0x%02x\n", cmd->scsi_status); + *post_ret = 1; + if (cmd->scsi_status == SAM_STAT_CHECK_CONDITION) + ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; goto out; }