[SCSI] mvsas: Add support for Non specific NCQ error interrupt

Signed-off-by: Xiangliang Yu <yuxiangl@marvell.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/scsi/mvsas/mv_sas.c b/drivers/scsi/mvsas/mv_sas.c
index 0ef27425c447..aaa475a3eda6 100644
--- a/drivers/scsi/mvsas/mv_sas.c
+++ b/drivers/scsi/mvsas/mv_sas.c
@@ -253,6 +253,20 @@ int mvs_find_dev_phyno(struct domain_device *dev, int *phyno)
         return num;
 }
 
+struct mvs_device *mvs_find_dev_by_reg_set(struct mvs_info *mvi,
+                                                u8 reg_set)
+{
+        u32 dev_no;
+        for (dev_no = 0; dev_no < MVS_MAX_DEVICES; dev_no++) {
+                if (mvi->devices[dev_no].taskfileset == MVS_ID_NOT_MAPPED)
+                        continue;
+
+                if (mvi->devices[dev_no].taskfileset == reg_set)
+                        return &mvi->devices[dev_no];
+        }
+        return NULL;
+}
+
 static inline void mvs_free_reg_set(struct mvs_info *mvi,
                                 struct mvs_device *dev)
 {