diff options
| author | Bin Liu <b-liu@ti.com> | 2020-05-24 21:50:44 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-05-25 13:36:30 +0200 |
| commit | 1b967691ecdcf512bc33c0783158f760e5c1a9cf (patch) | |
| tree | 801bc67908158c9d87d8113febe1f9bbd02f09d8 /drivers/soundwire/intel.c | |
| parent | ca681aa49200422a4144ee376a2079a9f717bf11 (diff) | |
usb: musb: return -ESHUTDOWN in urb when three-strikes error happened
When a USB device attached to a hub got disconnected, MUSB controller
generates RXCSR_RX_ERROR interrupt for the 3-strikes-out error.
Currently the MUSB host driver returns -EPROTO in current URB, then the
USB device driver could immediately resubmit the URB which causes MUSB
generate RXCSR_RX_ERROR interrupt again. This circle causes interrupt
storm then the hub never got a chance to report the USB device detach.
To fix the interrupt storm, change the URB return code to -ESHUTDOWN for
MUSB_RXCSR_H_ERROR interrupt, so that the USB device driver will not
immediately resubmit the URB.
Signed-off-by: Bin Liu <b-liu@ti.com>
Link: https://lore.kernel.org/r/20200525025049.3400-2-b-liu@ti.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/soundwire/intel.c')
0 files changed, 0 insertions, 0 deletions