wait_for_completion_timeout does not return negative values so the tests
for <= 0 are not needed and the case differentiation in the error handling
I decided to verify your statement and I saw that it seems wrong.
do_wait_for_common() can return -ERESTARTSYS and the return value gets
returned by its callers unchanged.
the -ERESTARTSYS only can be returned if state matches but
wait_for_completion_timemout passes TASK_UNINTERRUPTIBLE
so signal_pending_state will return 0 and never negativ
my understanding of the callchain is:
wait_for_completion_timemout with TASK_UNINTERRUPTIBLE
static inline int signal_pending_state(long state, struct task_struct *p)
if (!(state & (TASK_INTERRUPTIBLE | TASK_WAKEKILL)))
so wait_for_completion_timemout should return 0 or 1 only
patch was only compile tested x86_64_defconfig + CONFIG_ATH_CARDS=m
patch is against linux-next 3.19.0-rc1 -next-20141226
Rather patches. It would have been better to send one patch instead of
4 patches with the same name.
sorry for that - I had split it into separate patches as it was
in different files - giving them the same name of course was a bit
please do give it one more look - if the above argument is invalid
I apologize for the noise.