[SCSI] 3ware 9000 disable local irqs during kmap_atomic

Equivalent of the same patch for the 3w-xxxx driver.

Signed-off-by: Adam Radford <linuxraid@amcc.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

diff --git a/drivers/scsi/3w-9xxx.c b/drivers/scsi/3w-9xxx.c
index 0d2b447c50ed6e9cea185bf4810a18858dd1ddc5..caeb6d246e578eb0732feb99def77729f1980877 100644 (file)
--- a/drivers/scsi/3w-9xxx.c
+++ b/drivers/scsi/3w-9xxx.c
@@ -65,6 +65,7 @@
    2.26.02.005 - Fix use_sg == 0 mapping on systems with 4GB or higher.
    2.26.02.006 - Fix 9550SX pchip reset timeout.
                  Add big endian support.
+   2.26.02.007 - Disable local interrupts during kmap/unmap_atomic().
 */
 
 #include <linux/module.h>
@@ -88,7 +89,7 @@
 #include "3w-9xxx.h"
 
 /* Globals */
-#define TW_DRIVER_VERSION "2.26.02.006"
+#define TW_DRIVER_VERSION "2.26.02.007"
 static TW_Device_Extension *twa_device_extension_list[TW_MAX_SLOT];
 static unsigned int twa_device_extension_count;
 static int twa_major = -1;
@@ -1942,9 +1943,13 @@ static void twa_scsiop_execute_scsi_complete(TW_Device_Extension *tw_dev, int re
                }
                if (tw_dev->srb[request_id]->use_sg == 1) {
                        struct scatterlist *sg = (struct scatterlist *)tw_dev->srb[request_id]->request_buffer;
-                       char *buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
+                       char *buf;
+                       unsigned long flags = 0;
+                       local_irq_save(flags);
+                       buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
                        memcpy(buf, tw_dev->generic_buffer_virt[request_id], sg->length);
                        kunmap_atomic(buf - sg->offset, KM_IRQ0);
+                       local_irq_restore(flags);
                }
        }
 } /* End twa_scsiop_execute_scsi_complete() */