[SCSI] qla2xxx: Add PCI error recovery support.

Additional cleanups and
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 27 insertions, 1 deletions

diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index eecae9905ec..dcfb24b198f 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -34,6 +34,7 @@ qla2100_intr_handler(int irq, void *dev_id)
         int             status;
         unsigned long   flags;
         unsigned long   iter;
+        uint16_t        hccr;
         uint16_t        mb[4];
 
         ha = (scsi_qla_host_t *) dev_id;
@@ -48,7 +49,23 @@ qla2100_intr_handler(int irq, void *dev_id)
 
         spin_lock_irqsave(&ha->hardware_lock, flags);
         for (iter = 50; iter--; ) {
-                if ((RD_REG_WORD(&reg->istatus) & ISR_RISC_INT) == 0)
+                hccr = RD_REG_WORD(&reg->hccr);
+                if (hccr & HCCR_RISC_PAUSE) {
+                        if (pci_channel_offline(ha->pdev))
+                                break;
+
+                        /*
+                         * Issue a "HARD" reset in order for the RISC interrupt
+                         * bit to be cleared.  Schedule a big hammmer to get
+                         * out of the RISC PAUSED state.
+                         */
+                        WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
+                        RD_REG_WORD(&reg->hccr);
+
+                        ha->isp_ops->fw_dump(ha, 1);
+                        set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
+                        break;
+                } else if ((RD_REG_WORD(&reg->istatus) & ISR_RISC_INT) == 0)
                         break;
 
                 if (RD_REG_WORD(&reg->semaphore) & BIT_0) {
@@ -127,6 +144,9 @@ qla2300_intr_handler(int irq, void *dev_id)
         for (iter = 50; iter--; ) {
                 stat = RD_REG_DWORD(&reg->u.isp2300.host_status);
                 if (stat & HSR_RISC_PAUSED) {
+                        if (pci_channel_offline(ha->pdev))
+                                break;
+
                         hccr = RD_REG_WORD(&reg->hccr);
                         if (hccr & (BIT_15 | BIT_13 | BIT_11 | BIT_8))
                                 qla_printk(KERN_INFO, ha, "Parity error -- "
@@ -1499,6 +1519,9 @@ qla24xx_intr_handler(int irq, void *dev_id)
         for (iter = 50; iter--; ) {
                 stat = RD_REG_DWORD(&reg->host_status);
                 if (stat & HSRX_RISC_PAUSED) {
+                        if (pci_channel_offline(ha->pdev))
+                                break;
+
                         hccr = RD_REG_DWORD(&reg->hccr);
 
                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
@@ -1633,6 +1656,9 @@ qla24xx_msix_default(int irq, void *dev_id)
         for (iter = 50; iter--; ) {
                 stat = RD_REG_DWORD(&reg->host_status);
                 if (stat & HSRX_RISC_PAUSED) {
+                        if (pci_channel_offline(ha->pdev))
+                                break;
+
                         hccr = RD_REG_DWORD(&reg->hccr);
 
                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "