From: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
This patch (as1220) automatically disables stalls when g_file_storage
finds itself running with an Atmel device controller, because the
Atmel hardware/driver isn't capable of halting bulk endpoints
correctly.
Reported-by: Stanislaw Gruszka <stf_xl@xxxxx>
Signed-off-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Acked-by: David Brownell <dbrownell@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/usb/gadget/file_storage.c | 6 +++++-
1 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/drivers/usb/gadget/file_storage.c b/drivers/usb/gadget/file_storage.c
index b10fa31..1ab9dac 100644
--- a/drivers/usb/gadget/file_storage.c
+++ b/drivers/usb/gadget/file_storage.c
@@ -3879,7 +3879,11 @@ static int __init check_parameters(struct fsg_dev *fsg)
mod_data.protocol_type = USB_SC_SCSI;
mod_data.protocol_name = "Transparent SCSI";
- if (gadget_is_sh(fsg->gadget))
+ /* Some peripheral controllers are known not to be able to
+ * halt bulk endpoints correctly. If one of them is present,
+ * disable stalls.
+ */
+ if (gadget_is_sh(fsg->gadget) || gadget_is_at91(fsg->gadget))
mod_data.can_stall = 0;
if (mod_data.release == 0xffff) { // Parameter wasn't set
--
1.6.0.2
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