From 3cb5469a2ab4b87a7c63dd218fdc1625bc73eccc Mon Sep 17 00:00:00 2001
From: Eric Moore <eric.moore@lsi.com>
Date: Thu, 8 Jul 2010 14:44:34 -0600
Subject: [SCSI] mpt2sas: driver fails to recover from injected PCIe bus errors
fixes surrounding PCIe enhanced error handling:
(1) We need to reject all request generated internaly inside the driver as well
as request arriving from the scsi mid layer when PCIe EEH is active. The fix is
to add a per adapter flag called pci_error_recovery which is checked thru out
the driver when request are generated.
(2) We don't need to call the pci_driver->remove directly from the PCIe
callbacks becuase its already called from the PCIe EEH code. In its place we are
shutting down the watchdog timer, and flushing back all pending IO.
(3) We need to save and restore the pci state across PCIe EEH handling.
Signed-off-by: Eric Moore <eric.moore@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
---
drivers/scsi/mpt2sas/mpt2sas_ctl.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
(limited to 'drivers/scsi/mpt2sas/mpt2sas_ctl.c')
diff --git a/drivers/scsi/mpt2sas/mpt2sas_ctl.c b/drivers/scsi/mpt2sas/mpt2sas_ctl.c
index 55ac1cb34778..b774973f0765 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_ctl.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_ctl.c
@@ -2156,7 +2156,7 @@ _ctl_ioctl_main(struct file *file, unsigned int cmd, void __user *arg)
!ioc)
return -ENODEV;
- if (ioc->shost_recovery)
+ if (ioc->shost_recovery || ioc->pci_error_recovery)
return -EAGAIN;
if (_IOC_SIZE(cmd) == sizeof(struct mpt2_ioctl_command)) {
@@ -2275,7 +2275,7 @@ _ctl_compat_mpt_command(struct file *file, unsigned cmd, unsigned long arg)
if (_ctl_verify_adapter(karg32.hdr.ioc_number, &ioc) == -1 || !ioc)
return -ENODEV;
- if (ioc->shost_recovery)
+ if (ioc->shost_recovery || ioc->pci_error_recovery)
return -EAGAIN;
memset(&karg, 0, sizeof(struct mpt2_ioctl_command));
--
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