From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
To: gregkh@linuxfoundation.org, mathias.nyman@intel.com
Cc: linux-usb@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
stable@vger.kernel.org,
Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Subject: [PATCH] usb: host: xhci-rcar: Fix timeout in xhci_suspend()
Date: Fri, 2 Aug 2019 17:33:35 +0900 [thread overview]
Message-ID: <1564734815-17964-1-git-send-email-yoshihiro.shimoda.uh@renesas.com> (raw)
When a USB device is connected to the host controller and
the system enters suspend, the following error happens
in xhci_suspend():
xhci-hcd ee000000.usb: WARN: xHC CMD_RUN timeout
Since the firmware/internal CPU control the USBSTS.STS_HALT
and the process speed is down when the roothub port enters U3,
long delay for the handshake of STS_HALT is neeed in xhci_suspend().
So, this patch adds to set the XHCI_SLOW_SUSPEND.
Fixes: 435cc1138ec9 ("usb: host: xhci-plat: set resume_quirk() for R-Car controllers")
Cc: <stable@vger.kernel.org> # v4.12+
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
---
drivers/usb/host/xhci-rcar.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/host/xhci-rcar.c b/drivers/usb/host/xhci-rcar.c
index 671bce1..8616c52 100644
--- a/drivers/usb/host/xhci-rcar.c
+++ b/drivers/usb/host/xhci-rcar.c
@@ -238,10 +238,15 @@ int xhci_rcar_init_quirk(struct usb_hcd *hcd)
* pointers. So, this driver clears the AC64 bit of xhci->hcc_params
* to call dma_set_coherent_mask(dev, DMA_BIT_MASK(32)) in
* xhci_gen_setup().
+ *
+ * And, since the firmware/internal CPU control the USBSTS.STS_HALT
+ * and the process speed is down when the roothub port enters U3,
+ * long delay for the handshake of STS_HALT is neeed in xhci_suspend().
*/
if (xhci_rcar_is_gen2(hcd->self.controller) ||
- xhci_rcar_is_gen3(hcd->self.controller))
- xhci->quirks |= XHCI_NO_64BIT_SUPPORT;
+ xhci_rcar_is_gen3(hcd->self.controller)) {
+ xhci->quirks |= XHCI_NO_64BIT_SUPPORT | XHCI_SLOW_SUSPEND;
+ }
if (!xhci_rcar_wait_for_pll_active(hcd))
return -ETIMEDOUT;
--
2.7.4
next reply other threads:[~2019-08-02 8:34 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-02 8:33 Yoshihiro Shimoda [this message]
2019-08-09 17:20 ` [PATCH] usb: host: xhci-rcar: Fix timeout in xhci_suspend() Simon Horman
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