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[media] gpsca: remove the risk of a division by zero

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As reported by Peter Kovar, there's a potential risk of a division by
zero on calls to jpeg_set_qual() when quality is zero.

As quality can't be 0 or lower than that, add an extra clause to cover
this special case.

Signed-off-by: Luis de Bethencourt <luis.bg@samsung.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Luis de Bethencourt 2015-02-09 07:16:25 -03:00 committed by Mauro Carvalho Chehab
parent 4bad5d2d25
commit d6d4c0e00f
1 changed files with 3 additions and 1 deletions
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4
drivers/media/usb/gspca/topro.c
View file

@ -969,7 +969,9 @@ static void jpeg_set_qual(u8 *jpeg_hdr,
{
int i, sc;
if (quality < 50)
if (quality <= 0)
sc = 5000;
else if (quality < 50)
sc = 5000 / quality;
else
sc = 200 - quality * 2;