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author | Sean Young | 2017-05-16 09:56:14 +0200 |
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committer | Mauro Carvalho Chehab | 2017-05-18 11:16:41 +0200 |
commit | 592ddc9f7db36c778d3bf9ffdfd93d8d5d548e48 (patch) | |
tree | 54d0f00a521bc3daebba00a24d9aad8a8ec2d123 /drivers/media/rc/sir_ir.c | |
parent | [media] atomisp: don't treat warnings as errors (diff) | |
download | kernel-qcow2-linux-592ddc9f7db36c778d3bf9ffdfd93d8d5d548e48.tar.gz kernel-qcow2-linux-592ddc9f7db36c778d3bf9ffdfd93d8d5d548e48.tar.xz kernel-qcow2-linux-592ddc9f7db36c778d3bf9ffdfd93d8d5d548e48.zip |
[media] sir_ir: infinite loop in interrupt handler
Since this driver does no detection of hardware, it might be used with
a non-sir port. Escape out if we are spinning.
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media/rc/sir_ir.c')
-rw-r--r-- | drivers/media/rc/sir_ir.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/media/rc/sir_ir.c b/drivers/media/rc/sir_ir.c index e12ec50bf0bf..90a5f8fd5eea 100644 --- a/drivers/media/rc/sir_ir.c +++ b/drivers/media/rc/sir_ir.c @@ -183,9 +183,15 @@ static irqreturn_t sir_interrupt(int irq, void *dev_id) static unsigned long delt; unsigned long deltintr; unsigned long flags; + int counter = 0; int iir, lsr; while ((iir = inb(io + UART_IIR) & UART_IIR_ID)) { + if (++counter > 256) { + dev_err(&sir_ir_dev->dev, "Trapped in interrupt"); + break; + } + switch (iir & UART_IIR_ID) { /* FIXME toto treba preriedit */ case UART_IIR_MSI: (void)inb(io + UART_MSR); |