usb: s3c-hsotg: Avoid TxFIFO corruption in DMA mode

Writing to TxFIFO relates only to Slave mode and leads to TxFIFO corruption in DMA mode. Signed-off-by: Anton Tikhomirov <av.tikhomirov@samsung.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
git-mirror · Apr 10, 2012 · 70fa030 · 70fa030
1 parent 659ad60
commit 70fa030
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c
@@ -1921,7 +1921,8 @@ static void s3c_hsotg_epint(struct s3c_hsotg *hsotg, unsigned int idx,
 		    ints & S3C_DIEPMSK_TxFIFOEmpty) {
 			dev_dbg(hsotg->dev, "%s: ep%d: TxFIFOEmpty\n",
 				__func__, idx);
-			s3c_hsotg_trytx(hsotg, hs_ep);
+			if (!using_dma(hsotg))
+				s3c_hsotg_trytx(hsotg, hs_ep);
 		}
 	}
 }