From: Pawel Laszczak <pawell@cadence.com>
To: <gregkh@linuxfoundation.org>, <linux-usb@vger.kernel.org>,
<felipe.balbi@linux.intel.com>
Cc: <dan.carpenter@oracle.com>, Pawel Laszczak <pawell@cadence.com>
Subject: [PATCH v3 -next] usb: cdns3: Fix sheduling with locks held.
Date: Thu, 26 Sep 2019 08:58:41 +0100 [thread overview]
Message-ID: <1569484721-4424-1-git-send-email-pawell@cadence.com> (raw)
Patch fix issue in cdns3_ep0_feature_handle_device function.
The function usleep_range can't be used there because this function is
called with locks held and IRQs disabled in
cdns3_device_thread_irq_handler().
To resolve this issue patch replaces usleep_range with mdelay.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Pawel Laszczak <pawell@cadence.com>
Fixes: 7733f6c32e36 ("usb: cdns3: Add Cadence USB3 DRD Driver")
---
v2: added Reported-by and Fixes tags
v3: added version of the patch
---
drivers/usb/cdns3/ep0.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/cdns3/ep0.c b/drivers/usb/cdns3/ep0.c
index 44f652e8b5a2..0445da0a5a0c 100644
--- a/drivers/usb/cdns3/ep0.c
+++ b/drivers/usb/cdns3/ep0.c
@@ -332,7 +332,7 @@ static int cdns3_ep0_feature_handle_device(struct cdns3_device *priv_dev,
* for sending status stage.
* This time should be less then 3ms.
*/
- usleep_range(1000, 2000);
+ mdelay(1);
cdns3_set_register_bit(&priv_dev->regs->usb_cmd,
USB_CMD_STMODE |
USB_STS_TMODE_SEL(tmode - 1));
--
2.17.1
next reply other threads:[~2019-09-26 7:59 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-26 7:58 Pawel Laszczak [this message]
2019-09-27 8:29 ` [PATCH v3 -next] usb: cdns3: Fix sheduling with locks held Peter Chen
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