From: Ben Dooks <ben-linux@xxxxxxxxx>
The USB documentation suggest that the FIFOs should be reset when a
bus reset event happens. Use the s3c_hsotg_init_fifo() to ensure that
the FIFO layout is correct and that the FIFOs are flushed before
acknowledging the reset.
Signed-off-by: Ben Dooks <ben-linux@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/usb/gadget/s3c-hsotg.c | 13 ++++---------
1 files changed, 4 insertions(+), 9 deletions(-)
diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c
index 354fd45..9d32c9f 100644
--- a/drivers/usb/gadget/s3c-hsotg.c
+++ b/drivers/usb/gadget/s3c-hsotg.c
@@ -2082,17 +2082,12 @@ irq_retry:
kill_all_requests(hsotg, &hsotg->eps[0], -ECONNRESET, true);
/* it seems after a reset we can end up with a situation
- * where the TXFIFO still has data in it... try flushing
- * it to remove anything that may still be in it.
+ * where the TXFIFO still has data in it... the docs
+ * suggest resetting all the fifos, so use the init_fifo
+ * code to relayout and flush the fifos.
*/
- if (1) {
- writel(S3C_GRSTCTL_TxFNum(0) | S3C_GRSTCTL_TxFFlsh,
- hsotg->regs + S3C_GRSTCTL);
-
- dev_info(hsotg->dev, "GNPTXSTS=%08x\n",
- readl(hsotg->regs + S3C_GNPTXSTS));
- }
+ s3c_hsotg_init_fifo(hsotg);
s3c_hsotg_enqueue_setup(hsotg);
--
1.7.2
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