On Wed, 25 Dec 2013 20:32:12 +0100 (CET) Julia Lawall <julia.law...@lip6.fr>
wrote:
> The function cmos_do_probe contains the code:
>
> if (is_hpet_enabled()) {
> int err;
>
> rtc_cmos_int_handler = hpet_rtc_interrupt;
> err = hpet_register_irq_handler(cmos_interrupt);
> if (err != 0) {
> dev_warn(dev, "hpet_register_irq_handler "
> " failed in rtc_init().");
> goto cleanup1;
> }
> }
>
> Is it intentional that the error code returned by
> hpet_register_irq_handler is put ina local variable that will not be seen
> at label cleanup1? The return value is retval, which is 0 at this point.
No, I'd say that's a bug. How does this look?
From: Andrew Morton <a...@linux-foundation.org>
Subject: drivers/rtc/rtc-cmos.c: propagate hpet_register_irq_handler() failure
If hpet_register_irq_handler() fails, cmos_do_probe() will incorrectly
return 0.
Reported-by: Julia Lawall <julia.law...@lip6.fr>
Cc: John Stultz <john.stu...@linaro.org>
Cc: Grant Likely <grant.lik...@linaro.org>
Cc: Rob Herring <robh...@kernel.org>
Signed-off-by: Andrew Morton <a...@linux-foundation.org>
---
drivers/rtc/rtc-cmos.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff -puN
drivers/rtc/rtc-cmos.c~drivers-rtc-rtc-cmosc-propagate-hpet_register_irq_handler-failure
drivers/rtc/rtc-cmos.c
---
a/drivers/rtc/rtc-cmos.c~drivers-rtc-rtc-cmosc-propagate-hpet_register_irq_handler-failure
+++ a/drivers/rtc/rtc-cmos.c
@@ -708,11 +708,9 @@ cmos_do_probe(struct device *dev, struct
irq_handler_t rtc_cmos_int_handler;
if (is_hpet_enabled()) {
- int err;
-
rtc_cmos_int_handler = hpet_rtc_interrupt;
- err = hpet_register_irq_handler(cmos_interrupt);
- if (err != 0) {
+ retval = hpet_register_irq_handler(cmos_interrupt);
+ if (retval) {
dev_warn(dev, "hpet_register_irq_handler "
" failed in rtc_init().");
goto cleanup1;
_
--
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