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-rw-r--r--drivers/scsi/megaraid/megaraid_mm.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/scsi/megaraid/megaraid_mm.c b/drivers/scsi/megaraid/megaraid_mm.c
index a70692779a16..4cf9ed96414f 100644
--- a/drivers/scsi/megaraid/megaraid_mm.c
+++ b/drivers/scsi/megaraid/megaraid_mm.c
@@ -179,8 +179,12 @@ mraid_mm_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
/*
* The following call will block till a kioc is available
+ * or return NULL if the list head is empty for the pointer
+ * of type mraid_mmapt passed to mraid_mm_alloc_kioc
*/
kioc = mraid_mm_alloc_kioc(adp);
+ if (!kioc)
+ return -ENXIO;
/*
* User sent the old mimd_t ioctl packet. Convert it to uioc_t.