malhuda/msm-4.14
1
0
Fork 0
mirror of https://github.com/rd-stuffs/msm-4.14.git synced 2025-02-20 11:45:48 +08:00
Code Issues Actions Packages Projects Releases Wiki Activity

[SCSI] qla2xxx: Always serialize mailbox command execution.

Browse Source 
Original code would incorrectly bypass serialization if the DPC
thread were performing a big-hammer operation (ISP abort).  This
short circuit, though rare, would subsequently stomp on a
secondary thread's mailbox command execution.  Found during
ISP81XX testing.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Andrew Vasquez 2009-01-22 09:45:31 -08:00 committed by James Bottomley
parent 09ff36d30c
commit 8eca3f39c4
1 changed files with 6 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/scsi/qla2xxx/qla_mbx.c
View File

@ -58,15 +58,12 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
* seconds. This is to serialize actual issuing of mailbox cmds during * seconds. This is to serialize actual issuing of mailbox cmds during
* non ISP abort time. * non ISP abort time.
*/ */
if (!abort_active) { if (!wait_for_completion_timeout(&ha->mbx_cmd_comp, mcp->tov * HZ)) {
if (!wait_for_completion_timeout(&ha->mbx_cmd_comp,
mcp->tov * HZ)) {
/* Timeout occurred. Return error. */ /* Timeout occurred. Return error. */
DEBUG2_3_11(printk("%s(%ld): cmd access timeout. " DEBUG2_3_11(printk("%s(%ld): cmd access timeout. "
"Exiting.\n", __func__, base_vha->host_no)); "Exiting.\n", __func__, base_vha->host_no));
return QLA_FUNCTION_TIMEOUT; return QLA_FUNCTION_TIMEOUT;
} }
}
ha->flags.mbox_busy = 1; ha->flags.mbox_busy = 1;
/* Save mailbox command for debug */ /* Save mailbox command for debug */
@ -265,7 +262,6 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
} }
/* Allow next mbx cmd to come in. */ /* Allow next mbx cmd to come in. */
if (!abort_active)
complete(&ha->mbx_cmd_comp); complete(&ha->mbx_cmd_comp);
if (rval) { if (rval) {