On Tue, Jul 17, 2018 at 05:24:17PM +0200, Niklas Söderlund wrote:
> The datasheet does not document any registers to control drive strength,
> and no drive strength registers are for this reason described for this
> SoC. The flags indicating that drive strength can be controlled are
> however set for some pins in the driver.
>
> This leads to a NULL pointer dereference when the sh-pfc core tries to
> access the struct describing the drive strength registers, for example
> when reading the sysfs file pinconf-pins.
>
> Fix this by removing the SH_PFC_PIN_CFG_DRIVE_STRENGTH from all pins
>
> Fixes: b92ac66a1819602b ("pinctrl: sh-pfc: Add R8A77970 PFC support")
> Signed-off-by: Niklas Söderlund <[email protected]>
>
> ---
> drivers/pinctrl/sh-pfc/pfc-r8a77970.c | 12 ++++++------
> 1 file changed, 6 insertions(+), 6 deletions(-)
>
> ---
>
> Hi,
>
> This is a backport of commit 550b6f7e8cf93fc2753aa01e655ed5471012ab5a
> from Linusw linux-pinctrl.git tree. It's applicable for v4.16 and v4.17.
4.16.y is long end-of-life, nothing I can do there anymore, sorry.
> This is my first backport patch submission for stable, please let me
> know if I can improve the format of this patch commit message or subject
> in any way.
Works just fine, now queued up for 4.17.y, thanks!
greg k-h
