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usb: renesas_usbhs: gadget: Fix usb_ep_set_{halt,wedge}() behavior

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According to usb_ep_set_halt()'s description,
__usbhsg_ep_set_halt_wedge() should return -EAGAIN if the IN endpoint
has any queue or data. Otherwise, this driver is possible to cause
just STALL without sending a short packet data on g_mass_storage driver,
and then a few resetting a device happens on a host side during
a usb enumaration.

Fixes: 2f98382dcd ("usb: renesas_usbhs: Add Renesas USBHS Gadget")
Cc: <stable@vger.kernel.org> # v3.0+
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/1569924633-322-3-git-send-email-yoshihiro.shimoda.uh@renesas.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Yoshihiro Shimoda
2019-10-01 19:10:33 +09:00
committed by Greg Kroah-Hartman
parent 1aae139429
commit 4d599cd3a0
6 changed files with 34 additions and 2 deletions
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1
drivers/usb/renesas_usbhs/common.h
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@@ -211,6 +211,7 @@ struct usbhs_priv;
/* DCPCTR */
#define BSTS (1 << 15) /* Buffer Status */
#define SUREQ (1 << 14) /* Sending SETUP Token */
#define INBUFM (1 << 14) /* (PIPEnCTR) Transfer Buffer Monitor */
#define CSSTS (1 << 12) /* CSSTS Status */
#define ACLRM (1 << 9) /* Buffer Auto-Clear Mode */
#define SQCLR (1 << 8) /* Toggle Bit Clear */