1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/ata/pata_ali.c b/drivers/ata/pata_ali.c
index 2035417fc1ab..76e386043dcd 100644
--- a/drivers/ata/pata_ali.c
+++ b/drivers/ata/pata_ali.c
@@ -153,11 +153,11 @@ static void ali_early_error_handler(struct ata_port *ap)
 
 static unsigned long ali_20_filter(const struct ata_port *ap, struct ata_device *adev, unsigned long mask)
 {
-        char model_num[40];
+        char model_num[ATA_ID_PROD_LEN];
         /* No DMA on anything but a disk for now */
         if (adev->class != ATA_DEV_ATA)
                 mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
-        ata_id_string(adev->id, model_num, ATA_ID_PROD_OFS, sizeof(model_num));
+        ata_id_string(adev->id, model_num, ATA_ID_PROD, sizeof(model_num));
         if (strstr(model_num, "WDC"))
                 return mask &= ~ATA_MASK_UDMA;
         return ata_pci_default_filter(ap, adev, mask);