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media: exynos-gsc: fix return code if mutex was interrupted 

All poll routines expect a poll flag, and not error codes. So,
instead of returning -ERESTARTSYS if the mutex got interrupted,
return EPOLERR, just like the V4L2 VB2 code.

Solves this sparce warning:
	drivers/media/platform/exynos-gsc/gsc-m2m.c:716:24: warning: incorrect type in return expression (different base types)
	drivers/media/platform/exynos-gsc/gsc-m2m.c:716:24:    expected restricted __poll_t
	drivers/media/platform/exynos-gsc/gsc-m2m.c:716:24:    got int

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Mauro Carvalho Chehab 2018-08-07 09:15:27 -04:00
parent 484f9b372d
commit 541b647a34
1 changed files with 1 additions and 1 deletions
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2
drivers/media/platform/exynos-gsc/gsc-m2m.c
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@ -713,7 +713,7 @@ static __poll_t gsc_m2m_poll(struct file *file,
__poll_t ret;
if (mutex_lock_interruptible(&gsc->lock))
return -ERESTARTSYS;
return EPOLLERR;
ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
mutex_unlock(&gsc->lock);