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V4L/DVB (9075): gspca: Bad check of returned status in i2c_read() spca561.

This makes auto gain functional on 04fc:0561.

Signed-off-by: Shane <gnome42@gmail.com>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

authored by Shane and committed by Mauro Carvalho Chehab 05d3c1e2 fe6c700f

+1 -1
unified split
+1 -1
drivers/media/video/gspca/spca561.c
··· 225 225 reg_w_val(gspca_dev->dev, 0x8802, (mode | 0x01)); 226 226 do { 227 227 reg_r(gspca_dev, 0x8803, 1); 228 - if (!gspca_dev->usb_buf) 228 + if (!gspca_dev->usb_buf[0]) 229 229 break; 230 230 } while (--retry); 231 231 if (retry == 0)