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Subject[PATCH] usb: dwc2: call dwc2_is_controller_alive() under spinlock
Date
This patch fixes bug described here:
https://lkml.org/lkml/2014/12/22/185

Signed-off-by: Robert Baldyga <r.baldyga@samsung.com>
---
drivers/usb/dwc2/core_intr.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/dwc2/core_intr.c b/drivers/usb/dwc2/core_intr.c
index ad43c5b..668c8dd 100644
--- a/drivers/usb/dwc2/core_intr.c
+++ b/drivers/usb/dwc2/core_intr.c
@@ -476,13 +476,13 @@ irqreturn_t dwc2_handle_common_intr(int irq, void *dev)
u32 gintsts;
irqreturn_t retval = IRQ_NONE;

+ spin_lock(&hsotg->lock);
+
if (!dwc2_is_controller_alive(hsotg)) {
dev_warn(hsotg->dev, "Controller is dead\n");
goto out;
}

- spin_lock(&hsotg->lock);
-
gintsts = dwc2_read_common_intr(hsotg);
if (gintsts & ~GINTSTS_PRTINT)
retval = IRQ_HANDLED;
--
1.9.1


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