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scsi: qla2xxx: Fix premature hw access after PCI error

Browse source 
commit e35920ab78 upstream.

After a recoverable PCI error has been detected and recovered, qla driver
needs to check to see if the error condition still persist and/or wait
for the OS to give the resume signal.

Sep  8 22:26:03 localhost kernel: WARNING: CPU: 9 PID: 124606 at qla_tmpl.c:440
qla27xx_fwdt_entry_t266+0x55/0x60 [qla2xxx]
Sep  8 22:26:03 localhost kernel: RIP: 0010:qla27xx_fwdt_entry_t266+0x55/0x60
[qla2xxx]
Sep  8 22:26:03 localhost kernel: Call Trace:
Sep  8 22:26:03 localhost kernel: ? qla27xx_walk_template+0xb1/0x1b0 [qla2xxx]
Sep  8 22:26:03 localhost kernel: ? qla27xx_execute_fwdt_template+0x12a/0x160
[qla2xxx]
Sep  8 22:26:03 localhost kernel: ? qla27xx_fwdump+0xa0/0x1c0 [qla2xxx]
Sep  8 22:26:03 localhost kernel: ? qla2xxx_pci_mmio_enabled+0xfb/0x120
[qla2xxx]
Sep  8 22:26:03 localhost kernel: ? report_mmio_enabled+0x44/0x80
Sep  8 22:26:03 localhost kernel: ? report_slot_reset+0x80/0x80
Sep  8 22:26:03 localhost kernel: ? pci_walk_bus+0x70/0x90
Sep  8 22:26:03 localhost kernel: ? aer_dev_correctable_show+0xc0/0xc0
Sep  8 22:26:03 localhost kernel: ? pcie_do_recovery+0x1bb/0x240
Sep  8 22:26:03 localhost kernel: ? aer_recover_work_func+0xaa/0xd0
Sep  8 22:26:03 localhost kernel: ? process_one_work+0x1a7/0x360
..
Sep  8 22:26:03 localhost kernel: qla2xxx [0000:42:00.2]-8041:22: detected PCI
disconnect.
Sep  8 22:26:03 localhost kernel: qla2xxx [0000:42:00.2]-107ff:22:
qla27xx_fwdt_entry_t262: dump ram MB failed. Area 5h start 198013h end 198013h
Sep  8 22:26:03 localhost kernel: qla2xxx [0000:42:00.2]-107ff:22: Unable to
capture FW dump
Sep  8 22:26:03 localhost kernel: qla2xxx [0000:42:00.2]-1015:22: cmd=0x0,
waited 5221 msecs
Sep  8 22:26:03 localhost kernel: qla2xxx [0000:42:00.2]-680d:22: mmio
enabled returning.
Sep  8 22:26:03 localhost kernel: qla2xxx [0000:42:00.2]-d04c:22: MBX
Command timeout for cmd 0, iocontrol=ffffffff jiffies=10140f2e5
mb[0-3]=[0xffff 0xffff 0xffff 0xffff]

Link: https://lore.kernel.org/r/20220110050218.3958-6-njavali@marvell.com
Cc: stable@vger.kernel.org
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Quinn Tran 2022-01-09 21:02:06 -08:00 committed by Greg Kroah-Hartman
parent 826a9d4a00
commit 5ef6319f98
2 changed files with 16 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
drivers/scsi/qla2xxx/qla_os.c
View file

@ -7641,7 +7641,7 @@ qla2xxx_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
switch (state) {
case pci_channel_io_normal:
ha->flags.eeh_busy = 0;
qla_pci_set_eeh_busy(vha);
if (ql2xmqsupport || ql2xnvmeenable) {
set_bit(QPAIR_ONLINE_CHECK_NEEDED, &vha->dpc_flags);
qla2xxx_wake_dpc(vha);
@ -7682,9 +7682,16 @@ qla2xxx_pci_mmio_enabled(struct pci_dev *pdev)
"mmio enabled\n");
ha->pci_error_state = QLA_PCI_MMIO_ENABLED;
if (IS_QLA82XX(ha))
return PCI_ERS_RESULT_RECOVERED;
if (qla2x00_isp_reg_stat(ha)) {
ql_log(ql_log_info, base_vha, 0x803f,
"During mmio enabled, PCI/Register disconnect still detected.\n");
goto out;
}
spin_lock_irqsave(&ha->hardware_lock, flags);
if (IS_QLA2100(ha) || IS_QLA2200(ha)){
stat = rd_reg_word(&reg->hccr);
@ -7706,6 +7713,7 @@ qla2xxx_pci_mmio_enabled(struct pci_dev *pdev)
"RISC paused -- mmio_enabled, Dumping firmware.\n");
qla2xxx_dump_fw(base_vha);
}
out:
/* set PCI_ERS_RESULT_NEED_RESET to trigger call to qla2xxx_pci_slot_reset */
ql_dbg(ql_dbg_aer, base_vha, 0x600d,
"mmio enabled returning.\n");

9
drivers/scsi/qla2xxx/qla_tmpl.c
View file

@ -435,8 +435,13 @@ qla27xx_fwdt_entry_t266(struct scsi_qla_host *vha,
{
ql_dbg(ql_dbg_misc, vha, 0xd20a,
"%s: reset risc [%lx]\n", __func__, *len);
if (buf)
WARN_ON_ONCE(qla24xx_soft_reset(vha->hw) != QLA_SUCCESS);
if (buf) {
if (qla24xx_soft_reset(vha->hw) != QLA_SUCCESS) {
ql_dbg(ql_dbg_async, vha, 0x5001,
"%s: unable to soft reset\n", __func__);
return INVALID_ENTRY;
}
}
return qla27xx_next_entry(ent);
}