Each USB transfer is split up into chunks that are held in an aligned
buffer. This imposes a limit on the size of each chunk, but no limit on
the total size of transferred data. Fix the logic in chunk_msg() not to
reject large transfers, but simply take the size of the aligned buffer
into account when calculating the chunk size.
Signed-off-by: Stephen Warren <swar...@wwwdotorg.org>
---
v2: New patch.
drivers/usb/host/dwc2.c | 12 +++---------
1 file changed, 3 insertions(+), 9 deletions(-)
diff --git a/drivers/usb/host/dwc2.c b/drivers/usb/host/dwc2.c
index 05d21b7948f5..e370d29ffc8e 100644
--- a/drivers/usb/host/dwc2.c
+++ b/drivers/usb/host/dwc2.c
@@ -756,24 +756,18 @@ int chunk_msg(struct usb_device *dev, unsigned long pipe,
int *pid, int in,
debug("%s: msg: pipe %lx pid %d in %d len %d\n", __func__, pipe, *pid,
in, len);
- if (len > DWC2_DATA_BUF_SIZE) {
- printf("%s: %d is more then available buffer size (%d)\n",
- __func__, len, DWC2_DATA_BUF_SIZE);
- dev->status = 0;
- dev->act_len = 0;
- return -EINVAL;
- }
-
do {
/* Initialize channel */
dwc_otg_hc_init(regs, DWC2_HC_CHANNEL, devnum, ep, in, eptype,
max);
xfer_len = len - done;
- /* Make sure that xfer_len is a multiple of max packet size. */
if (xfer_len > CONFIG_DWC2_MAX_TRANSFER_SIZE)
xfer_len = CONFIG_DWC2_MAX_TRANSFER_SIZE - max + 1;
+ if (xfer_len > DWC2_DATA_BUF_SIZE)
+ xfer_len = DWC2_DATA_BUF_SIZE - max + 1;
+ /* Make sure that xfer_len is a multiple of max packet size. */
if (xfer_len > 0) {
num_packets = (xfer_len + max - 1) / max;
if (num_packets > CONFIG_DWC2_MAX_PACKET_COUNT) {
--
1.9.1
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