diff options
| author | Mathias Kresin <dev@kresin.me> | 2019-07-07 16:22:01 +0200 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2019-10-22 09:42:08 +0200 |
| commit | 6689f0f4bb14e50917ba42eb9b41c25e0184970c (patch) | |
| tree | f77808722dfe65e33af048d98c651dcf9eefc0cb /drivers/usb/dwc2 | |
| parent | usb: gadget: udc: lpc32xx: Use devm_platform_ioremap_resource() in lpc32xx_ud... (diff) | |
| download | linux-6689f0f4bb14e50917ba42eb9b41c25e0184970c.tar.xz linux-6689f0f4bb14e50917ba42eb9b41c25e0184970c.zip | |
usb: dwc2: use a longer core rest timeout in dwc2_core_reset()
Testing on different generations of Lantiq MIPS SoC based boards, showed
that it takes up to 1500 us until the core reset bit is cleared.
The driver from the vendor SDK (ifxhcd) uses a 1 second timeout. Use the
same timeout to fix wrong hang detections and make the driver work for
Lantiq MIPS SoCs.
At least till kernel 4.14 the hanging reset only caused a warning but
the driver was probed successful. With kernel 4.19 errors out with
EBUSY.
Cc: linux-stable <stable@vger.kernel.org> # 4.19+
Signed-off-by: Mathias Kresin <dev@kresin.me>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/dwc2')
| -rw-r--r-- | drivers/usb/dwc2/core.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c index 8e41d70fd298..78a4925aa118 100644 --- a/drivers/usb/dwc2/core.c +++ b/drivers/usb/dwc2/core.c @@ -524,7 +524,7 @@ int dwc2_core_reset(struct dwc2_hsotg *hsotg, bool skip_wait) greset |= GRSTCTL_CSFTRST; dwc2_writel(hsotg, greset, GRSTCTL); - if (dwc2_hsotg_wait_bit_clear(hsotg, GRSTCTL, GRSTCTL_CSFTRST, 50)) { + if (dwc2_hsotg_wait_bit_clear(hsotg, GRSTCTL, GRSTCTL_CSFTRST, 10000)) { dev_warn(hsotg->dev, "%s: HANG! Soft Reset timeout GRSTCTL GRSTCTL_CSFTRST\n", __func__); return -EBUSY; |