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-rw-r--r--drivers/ata/libata-scsi.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 061fe63497bf..97c84b0ec472 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -2245,10 +2245,15 @@ static inline u16 ata_xlat_cdl_limit(u8 *buf)
static unsigned int ata_msense_control_spgt2(struct ata_device *dev, u8 *buf,
u8 spg)
{
- u8 *b, *cdl = dev->cdl->desc_log_buf, *desc;
+ u8 *b, *cdl, *desc;
u32 policy;
int i;
+ if (!(dev->flags & ATA_DFLAG_CDL) || !dev->cdl)
+ return 0;
+
+ cdl = dev->cdl->desc_log_buf;
+
/*
* Fill the subpage. The first four bytes of the T2A/T2B mode pages
* are a header. The PAGE LENGTH field is the size of the page