Interrupt transfers requiring several transactions are not supported by
submit_int_msg() because bInterval is ignored. This patch returns a failure code
and prints an error message in this case.
Signed-off-by: Benoît Thébaudeau <benoit.thebaud...@advansee.com>
Cc: Marek Vasut <ma...@denx.de>
Cc: Ilya Yanok <ilya.ya...@cogentembedded.com>
Cc: Stefan Herbrechtsmeier <ste...@herbrechtsmeier.net>
---
Changes for v2: N/A.
Changes for v3:
- New patch.
.../drivers/usb/host/ehci-hcd.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git u-boot-usb-8d5fb14.orig/drivers/usb/host/ehci-hcd.c
u-boot-usb-8d5fb14/drivers/usb/host/ehci-hcd.c
index 1977c28..a4c84a3 100644
--- u-boot-usb-8d5fb14.orig/drivers/usb/host/ehci-hcd.c
+++ u-boot-usb-8d5fb14/drivers/usb/host/ehci-hcd.c
@@ -836,8 +836,17 @@ int
submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
int length, int interval)
{
-
debug("dev=%p, pipe=%lu, buffer=%p, length=%d, interval=%d",
dev, pipe, buffer, length, interval);
+
+ /*
+ * Interrupt transfers requiring several transactions are not supported
+ * because bInterval is ignored.
+ */
+ if (length > usb_maxpacket(dev, pipe)) {
+ printf("%s: Interrupt transfers requiring several transactions "
+ "are not\nsupported.\n", __func__);
+ return -1;
+ }
return ehci_submit_async(dev, pipe, buffer, length, NULL);
}
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