diff options
| author | Sumit Saxena <sumit.saxena@avagotech.com> | 2016-01-28 21:04:22 +0530 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2016-02-23 21:27:02 -0500 |
| commit | 11c71cb4ab7cd901b9d6f0ff267c102778c1c8ef (patch) | |
| tree | 2f0e8ba94af31b930211076881154413c15c24a7 /drivers/scsi/megaraid/megaraid_sas.h | |
| parent | 3846470a1bd4eaaf321386db96772769d630f169 (diff) | |
megaraid_sas: Do not allow PCI access during OCR
This patch will do synhronization between OCR function and AEN function
using "reset_mutex" lock. reset_mutex will be acquired only in the
first half of the AEN function which issues a DCMD. Second half of the
function which calls SCSI API (scsi_add_device/scsi_remove_device)
should be out of reset_mutex to avoid deadlock between scsi_eh thread
and driver.
During chip reset (inside OCR function), there should not be any PCI
access and AEN function (which is called in delayed context) may be
firing DCMDs (doing PCI writes) when chip reset is happening in parallel
which will cause FW fault. This patch will solve the problem by making
AEN thread and OCR thread mutually exclusive.
Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com>
Signed-off-by: Kashyap Desai <kashyap.desai@avagotech.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/megaraid/megaraid_sas.h')
| -rw-r--r-- | drivers/scsi/megaraid/megaraid_sas.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h index c0f7c8ce54aa..ef4ff03242ea 100644 --- a/drivers/scsi/megaraid/megaraid_sas.h +++ b/drivers/scsi/megaraid/megaraid_sas.h @@ -1083,6 +1083,8 @@ struct megasas_ctrl_info { #define VD_EXT_DEBUG 0 +#define SCAN_PD_CHANNEL 0x1 +#define SCAN_VD_CHANNEL 0x2 enum MR_SCSI_CMD_TYPE { READ_WRITE_LDIO = 0, |