[SCSI] qla2xxx: Add cond_resched() calls during HBA flash manipulation.

We're observing soft lockups during HBA FLASH retrieval and
update.  Add cond_resched() each time around the tight-loops
during flash read()s/write()s.

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

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_sup.c b/drivers/scsi/qla2xxx/qla_sup.c
index ff1dd4175a7f..362d041419fc 100644
--- a/drivers/scsi/qla2xxx/qla_sup.c
+++ b/drivers/scsi/qla2xxx/qla_sup.c
@@ -466,6 +466,7 @@ qla24xx_read_flash_dword(scsi_qla_host_t *ha, uint32_t addr)
                         udelay(10);
                 else
                         rval = QLA_FUNCTION_TIMEOUT;
+                cond_resched();
         }
 
         /* TODO: What happens if we time out? */
@@ -508,6 +509,7 @@ qla24xx_write_flash_dword(scsi_qla_host_t *ha, uint32_t addr, uint32_t data)
                         udelay(10);
                 else
                         rval = QLA_FUNCTION_TIMEOUT;
+                cond_resched();
         }
         return rval;
 }
@@ -1255,6 +1257,7 @@ qla2x00_poll_flash(scsi_qla_host_t *ha, uint32_t addr, uint8_t poll_data,
                 }
                 udelay(10);
                 barrier();
+                cond_resched();
         }
         return status;
 }
@@ -1403,6 +1406,7 @@ qla2x00_read_flash_data(scsi_qla_host_t *ha, uint8_t *tmp_buf, uint32_t saddr,
                 if (saddr % 100)
                         udelay(10);
                 *tmp_buf = data;
+                cond_resched();
         }
 }
 
@@ -1689,6 +1693,7 @@ update_flash:
                                 rval = QLA_FUNCTION_FAILED;
                                 break;
                         }
+                        cond_resched();
                 }
         } while (0);
         qla2x00_flash_disable(ha);