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authorVikas Chaudhary <vikas.chaudhary@qlogic.com>2012-08-22 07:55:06 -0400
committerJames Bottomley <JBottomley@Parallels.com>2012-09-24 12:11:07 +0400
commit83dbdf6f5205832fd5b98d9324fad51927832879 (patch)
tree9a74b33840ac77bb9c6a9b37ae58cba0e7699e8a /drivers/scsi/qla4xxx/ql4_nx.c
parentee996a691752ae55d26c1dd6de7421c1eb64cffb (diff)
downloadlinux-83dbdf6f5205832fd5b98d9324fad51927832879.tar.bz2
[SCSI] qla4xxx: Set IDC version in correct way
Issue: Device can go to READY state from COLD and skip INITIALIZATION, In this case driver will never set IDC version from function qla4_8xxx_device_bootstrap(). Fix: 1. Set IDC version at start of function qla4_82xx_need_reset_handler(). 2. Set IDC version only if we are 1st driver to load. 3. Added new function qla4_8xxx_update_idc_reg() to set all idc reg at one place. Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/qla4xxx/ql4_nx.c')
-rw-r--r--drivers/scsi/qla4xxx/ql4_nx.c42
1 files changed, 33 insertions, 9 deletions
diff --git a/drivers/scsi/qla4xxx/ql4_nx.c b/drivers/scsi/qla4xxx/ql4_nx.c
index 13d8e4895f58..70793bf9cbc1 100644
--- a/drivers/scsi/qla4xxx/ql4_nx.c
+++ b/drivers/scsi/qla4xxx/ql4_nx.c
@@ -2337,10 +2337,6 @@ dev_initialize:
qla4_8xxx_wr_direct(ha, QLA8XXX_CRB_DEV_STATE,
QLA8XXX_DEV_INITIALIZING);
- /* Driver that sets device state to initializating sets IDC version */
- qla4_8xxx_wr_direct(ha, QLA8XXX_CRB_DRV_IDC_VERSION,
- QLA82XX_IDC_VERSION);
-
ha->isp_ops->idc_unlock(ha);
if (ql4xenablemd && test_bit(AF_FW_RECOVERY, &ha->flags) &&
!test_and_set_bit(AF_82XX_FW_DUMPED, &ha->flags)) {
@@ -2463,6 +2459,38 @@ qla4_8xxx_need_qsnt_handler(struct scsi_qla_host *ha)
ha->isp_ops->idc_unlock(ha);
}
+static void qla4_82xx_set_idc_ver(struct scsi_qla_host *ha)
+{
+ int idc_ver;
+ uint32_t drv_active;
+
+ drv_active = qla4_8xxx_rd_direct(ha, QLA8XXX_CRB_DRV_ACTIVE);
+ if (drv_active == (1 << (ha->func_num * 4))) {
+ qla4_8xxx_wr_direct(ha, QLA8XXX_CRB_DRV_IDC_VERSION,
+ QLA82XX_IDC_VERSION);
+ ql4_printk(KERN_INFO, ha,
+ "%s: IDC version updated to %d\n", __func__,
+ QLA82XX_IDC_VERSION);
+ } else {
+ idc_ver = qla4_8xxx_rd_direct(ha, QLA8XXX_CRB_DRV_IDC_VERSION);
+ if (QLA82XX_IDC_VERSION != idc_ver) {
+ ql4_printk(KERN_INFO, ha,
+ "%s: qla4xxx driver IDC version %d is not compatible with IDC version %d of other drivers!\n",
+ __func__, QLA82XX_IDC_VERSION, idc_ver);
+ }
+ }
+}
+
+static void qla4_8xxx_update_idc_reg(struct scsi_qla_host *ha)
+{
+ if (!test_bit(AF_INIT_DONE, &ha->flags)) {
+ ha->isp_ops->idc_lock(ha);
+ qla4_8xxx_set_drv_active(ha);
+ qla4_82xx_set_idc_ver(ha);
+ ha->isp_ops->idc_unlock(ha);
+ }
+}
+
/**
* qla4_8xxx_device_state_handler - Adapter state machine
* @ha: pointer to host adapter structure.
@@ -2475,11 +2503,7 @@ int qla4_8xxx_device_state_handler(struct scsi_qla_host *ha)
int rval = QLA_SUCCESS;
unsigned long dev_init_timeout;
- if (!test_bit(AF_INIT_DONE, &ha->flags)) {
- ha->isp_ops->idc_lock(ha);
- qla4_8xxx_set_drv_active(ha);
- ha->isp_ops->idc_unlock(ha);
- }
+ qla4_8xxx_update_idc_reg(ha);
dev_state = qla4_8xxx_rd_direct(ha, QLA8XXX_CRB_DEV_STATE);
DEBUG2(ql4_printk(KERN_INFO, ha, "Device state is 0x%x = %s\n",