diff options
| author | Richard Zhao <richard.zhao@freescale.com> | 2012-09-12 15:58:11 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-09-12 22:20:38 +0400 |
| commit | b183c19f98f8afee799ee41e062810d6b1c7e123 (patch) | |
| tree | d1cd7920d4e434930d75ad2577c10ed249036f7e /drivers/usb/chipidea | |
| parent | 388ed487234429652c1cdb797ad45cb0967b2343 (diff) | |
| download | linux-b183c19f98f8afee799ee41e062810d6b1c7e123.tar.xz | |
USB: chipidea: re-order irq handling to avoid unhandled irqs
- let role driver handle irq before ID change check; this gives the
role driver a chance to handle disconnect;
- disable irq during switch role; no role driver to handle irq in
the period.
Tested-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Tested-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Richard Zhao <richard.zhao@freescale.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/chipidea')
| -rw-r--r-- | drivers/usb/chipidea/core.c | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c index 19ef3242cf43..f69d029b4607 100644 --- a/drivers/usb/chipidea/core.c +++ b/drivers/usb/chipidea/core.c @@ -279,6 +279,7 @@ static void ci_role_work(struct work_struct *work) ci_role_stop(ci); ci_role_start(ci, role); + enable_irq(ci->irq); } } @@ -318,18 +319,22 @@ static irqreturn_t ci_irq(int irq, void *data) { struct ci13xxx *ci = data; irqreturn_t ret = IRQ_NONE; + u32 otgsc = 0; - if (ci->is_otg) { - u32 sts = hw_read(ci, OP_OTGSC, ~0); + if (ci->is_otg) + otgsc = hw_read(ci, OP_OTGSC, ~0); + + if (ci->role != CI_ROLE_END) + ret = ci_role(ci)->irq(ci); - if (sts & OTGSC_IDIS) { - hw_write(ci, OP_OTGSC, OTGSC_IDIS, OTGSC_IDIS); - queue_work(ci->wq, &ci->work); - ret = IRQ_HANDLED; - } + if (ci->is_otg && (otgsc & OTGSC_IDIS)) { + hw_write(ci, OP_OTGSC, OTGSC_IDIS, OTGSC_IDIS); + disable_irq_nosync(ci->irq); + queue_work(ci->wq, &ci->work); + ret = IRQ_HANDLED; } - return ci->role == CI_ROLE_END ? ret : ci_role(ci)->irq(ci); + return ret; } static DEFINE_IDA(ci_ida); |