Commit daa1c164 authored by Andy Walls's avatar Andy Walls Committed by Mauro Carvalho Chehab

V4L/DVB (9778): cx18: cx18_writel_expect() should not declare success on a PCI read error

cx18: cx18_writel_expect() should not declare success on a PCI read error.
This removes the potential for cx18_write*_expect() calls to not
accomplish a PCI write successfully as expected.  The CX18-AV core uses the
*expect() calls often and this may be the source of intermittent audio
problems and standands switching problems.
Signed-off-by: default avatarAndy Walls <awalls@radix.net>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 572bfea7
......@@ -83,10 +83,14 @@ void cx18_writel_expect(struct cx18 *cx, u32 val, void __iomem *addr,
u32 eval, u32 mask)
{
int i;
u32 r;
eval &= mask;
for (i = 0; i < CX18_MAX_MMIO_WR_RETRIES; i++) {
cx18_writel_noretry(cx, val, addr);
if (eval == (cx18_readl(cx, addr) & mask))
r = cx18_readl(cx, addr);
if (r == 0xffffffff && eval != 0xffffffff)
continue;
if (eval == (r & mask))
break;
}
}
......
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