scsi: qla2xxx: Disable ATIO interrupt coalesce for quad port ISP27XX

stable inclusion
from stable-v5.10.143
commit 004e26ef056c5df46f42d15610473c6dc08920e2
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I6D0U6

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=004e26ef056c5df46f42d15610473c6dc08920e2

--------------------------------

[ Upstream commit 53661ded ]

This partially reverts commit d2b292c3 ("scsi: qla2xxx: Enable ATIO
interrupt handshake for ISP27XX")

For some workloads where the host sends a batch of commands and then
pauses, ATIO interrupt coalesce can cause some incoming ATIO entries to be
ignored for extended periods of time, resulting in slow performance,
timeouts, and aborted commands.

Disable interrupt coalesce and re-enable the dedicated ATIO MSI-X
interrupt.

Link: https://lore.kernel.org/r/97dcf365-89ff-014d-a3e5-1404c6af511c@cybernetics.comReviewed-by: NHimanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: NNilesh Javali <njavali@marvell.com>
Signed-off-by: NTony Battersby <tonyb@cybernetics.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NJialin Zhang <zhangjialin11@huawei.com>
Reviewed-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/scsi/qla2xxx/qla_target.c

@@ -6817,14 +6817,8 @@ qlt_24xx_config_rings(struct scsi_qla_host *vha)
 
 	if (ha->flags.msix_enabled) {
 		if (IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
-			if (IS_QLA2071(ha)) {
-				/* 4 ports Baker: Enable Interrupt Handshake */
-				icb->msix_atio = 0;
-				icb->firmware_options_2 |= cpu_to_le32(BIT_26);
-			} else {
 			icb->msix_atio = cpu_to_le16(msix->entry);
 			icb->firmware_options_2 &= cpu_to_le32(~BIT_26);
-			}
 			ql_dbg(ql_dbg_init, vha, 0xf072,
 			    "Registering ICB vector 0x%x for atio que.\n",
 			    msix->entry);