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Groups > linux.kernel > #1711733

[PATCH 3.18 05/16] usb: musb: fix tx fifo flush handling again

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3.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Bin Liu <b-liu@ti.com>

commit 45d73860530a14c608f410b91c6c341777bfa85d upstream.

commit 68fe05e2a451 ("usb: musb: fix tx fifo flush handling") drops the
1ms delay trying to solve the long disconnect time issue when
application queued many tx urbs. However, the 1ms delay is needed for
some use cases, for example, without the delay, reconnecting AR9271 WIFI
dongle no longer works if the connection is dropped from the AP.

So let's add back the 1ms delay in musb_h_tx_flush_fifo(), and solve the
long disconnect time problem with a separate patch for
usb_hcd_flush_endpoint().

Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/usb/musb/musb_host.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -1294,6 +1294,7 @@ void musb_host_tx(struct musb *musb, u8
 					| MUSB_TXCSR_TXPKTRDY);
 		}
 			return;
+		mdelay(1);
 	}
 
 done:

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[PATCH 3.18 00/16] 3.18.66-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 03:20 +0200
  [PATCH 3.18 01/16] mm: ratelimit PFNs busy info message Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 03:20 +0200
  [PATCH 3.18 11/16] usb: quirks: Add no-lpm quirk for Moshi USB to Ethernet Adapter Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 04:00 +0200
  [PATCH 3.18 06/16] USB: hcd: Mark secondary HCD as dead if the primary one died Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 04:00 +0200
  [PATCH 3.18 08/16] iio: light: tsl2563: use correct event code Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 04:00 +0200
  [PATCH 3.18 05/16] usb: musb: fix tx fifo flush handling again Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 04:00 +0200
  [PATCH 3.18 14/16] pnfs/blocklayout: require 64-bit sector_t Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 04:00 +0200
  [PATCH 3.18 03/16] USB: serial: option: add D-Link DWM-222 device ID Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 04:00 +0200
  [PATCH 3.18 07/16] staging:iio:resolver:ad2s1210 fix negative IIO_ANGL_VEL read Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 04:00 +0200
  [PATCH 3.18 15/16] pinctrl: sunxi: add a missing function of A10/A20 pinctrl driver Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 04:00 +0200
  [PATCH 3.18 10/16] USB: Check for dropped connection before switching to full speed Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 04:00 +0200
  [PATCH 3.18 04/16] USB: serial: cp210x: add support for Qivicon USB ZigBee dongle Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 04:00 +0200
  [PATCH 3.18 16/16] pinctrl: samsung: Remove bogus irq_[un]mask from resource management Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 04:00 +0200
  [PATCH 3.18 12/16] usb:xhci:Add quirk for Certain failing HP keyboard on reset after resume Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 04:10 +0200
  [PATCH 3.18 02/16] fuse: initialize the flock flag in fuse_file on allocation Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 04:10 +0200
  [PATCH 3.18 13/16] iio: adc: vf610_adc: Fix VALT selection value for REFSEL bits Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-08-15 04:10 +0200
  Re: [PATCH 3.18 00/16] 3.18.66-stable review Guenter Roeck <linux@roeck-us.net> - 2017-08-15 12:50 +0200
  Re: [PATCH 3.18 00/16] 3.18.66-stable review Shuah Khan <shuahkh@osg.samsung.com> - 2017-08-15 20:10 +0200

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