scsi: megaraid_sas: avoid unaligned access in ioctl path

Fix kernel warning for accessing unaligned memory access in driver.

Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index b2da257..5d7aa05 100644 (file)
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -43,6 +43,7 @@
 #include <linux/uio.h>
 #include <linux/slab.h>
 #include <linux/uaccess.h>
+#include <asm/unaligned.h>
 #include <linux/fs.h>
 #include <linux/compat.h>
 #include <linux/blkdev.h>
@@ -7007,7 +7008,8 @@ megasas_mgmt_fw_ioctl(struct megasas_instance *instance,
                sense_ptr = (unsigned long *) ((unsigned long)ioc->frame.raw +
                                ioc->sense_off);
 
-               if (copy_to_user((void __user *)((unsigned long)(*sense_ptr)),
+               if (copy_to_user((void __user *)((unsigned long)
+                                get_unaligned((unsigned long *)sense_ptr)),
                                 sense, ioc->sense_len)) {
                        dev_err(&instance->pdev->dev, "Failed to copy out to user "
                                        "sense data\n");