From: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
This patch has been added to the 3.18 stable tree. If you have any
objections, please let us know.
===============
[ Upstream commit 033365191136c97f88c81b7bd0011414db28bb4e ]
The previous change 3973c526ae9c (net: can: c_can: Disable pins when CAN
interface is down) causes a slight glitch on the pinctrl settings when used.
Since commit ab78029 (drivers/pinctrl: grab default handles from device core),
the device core will automatically set the default pins. This causes the pins
to be momentarily set to the default and then to the sleep state in
register_c_can_dev(). By adding an optional "enable" state, boards can set the
default pin state to be disabled and avoid the glitch when the switch from
default to sleep first occurs. If the "enable" state is not available
c_can_pinctrl_select_state() falls back to using the "default" pinctrl state.
[Roger Q] - Forward port to v4.2 and use pinctrl_get_select().
Signed-off-by: J.D. Schroeder <jay.schroeder@xxxxxxxxxx>
Signed-off-by: Roger Quadros <rogerq@xxxxxx>
Reviewed-by: Grygorii Strashko <grygorii.strashko@xxxxxx>
Cc: linux-stable <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx>
---
arch/s390/kernel/process.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index ed84cc2..9b72e68 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -171,7 +171,7 @@ asmlinkage void execve_tail(void)
{
current->thread.fp_regs.fpc = 0;
if (MACHINE_HAS_IEEE)
- asm volatile("sfpc %0,%0" : : "d" (0));
+ asm volatile("sfpc %0" : : "d" (0));
}
/*
--
2.1.4
--
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