From 3cb5469a2ab4b87a7c63dd218fdc1625bc73eccc Mon Sep 17 00:00:00 2001 From: Eric Moore 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 Signed-off-by: James Bottomley --- drivers/scsi/mpt2sas/mpt2sas_base.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'drivers/scsi/mpt2sas/mpt2sas_base.c') diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.c b/drivers/scsi/mpt2sas/mpt2sas_base.c index 1f22a764927..57bcd5c9dcf 100644 --- a/drivers/scsi/mpt2sas/mpt2sas_base.c +++ b/drivers/scsi/mpt2sas/mpt2sas_base.c @@ -1311,6 +1311,9 @@ mpt2sas_base_map_resources(struct MPT2SAS_ADAPTER *ioc) printk(MPT2SAS_INFO_FMT "ioport(0x%016llx), size(%d)\n", ioc->name, (unsigned long long)pio_chip, pio_sz); + /* Save PCI configuration state for recovery from PCI AER/EEH errors */ + pci_save_state(pdev); + return 0; out_fail: @@ -3407,6 +3410,9 @@ _base_make_ioc_ready(struct MPT2SAS_ADAPTER *ioc, int sleep_flag, dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name, __func__)); + if (ioc->pci_error_recovery) + return 0; + ioc_state = mpt2sas_base_get_iocstate(ioc, 0); dhsprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: ioc_state(0x%08x)\n", ioc->name, __func__, ioc_state)); @@ -3869,6 +3875,13 @@ mpt2sas_base_hard_reset_handler(struct MPT2SAS_ADAPTER *ioc, int sleep_flag, dtmprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: enter\n", ioc->name, __func__)); + if (ioc->pci_error_recovery) { + printk(MPT2SAS_ERR_FMT "%s: pci error recovery reset\n", + ioc->name, __func__); + r = 0; + goto out; + } + if (mpt2sas_fwfault_debug) mpt2sas_halt_firmware(ioc); -- cgit v1.2.3-70-g09d2