media: cx24116: prevent overflows on SNR calculus

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commit 576a307a76 upstream.

as reported by Coverity, if reading SNR registers fail, a negative
number will be returned, causing an underflow when reading SNR
registers.

Prevent that.

Fixes: 8953db793d ("V4L/DVB (9178): cx24116: Add module parameter to return SNR as ESNO.")
Cc: stable@vger.kernel.org
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Mauro Carvalho Chehab 2024-10-15 12:14:11 +02:00 • committed by Greg Kroah-Hartman

parent c85db2d443

commit fbefe31e45

1 changed files with 6 additions and 1 deletions

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drivers/media/dvb-frontends/cx24116.c

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