Hi Jonas,
On Tue, Jul 18, 2017 at 12:17 PM, Jonas Gorski <jonas.gorski@xxxxxxxxx> wrote:
The common clock and several other clock API implementations allow
calling clk_get_rate with a NULL pointer. While not specified as
expected behavior of the API, device drivers have come to rely on that,
causing them to OOPS when run on a platform with a different clock API
implementation.
Fix this by making sure all clk_get_rate implementations handle
NULL clocks instead of OOPSing.
While some custom implementations even allow ERR_PTR()s, I decided
against that as IIRC the usual idea is that errors should be handled and
not silently carried over.
Cc: adi-buildroot-devel@xxxxxxxxxxxxxxxxxxxxx
Cc: bcm-kernel-feedback-list@xxxxxxxxxxxx
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: linux-m68k@xxxxxxxxxxxxxxxxxxxx
Cc: linux-mips@xxxxxxxxxxxxxx
Jonas Gorski (9):
ARM: ep93xx: allow NULL clock for clk_get_rate
ARM: mmp: allow NULL clock for clk_get_rate
blackfin: bf609: allow NULL clock for clk_get_rate
m68k: allow NULL clock for clk_get_rate
MIPS: AR7: allow NULL clock for clk_get_rate
MIPS: BCM63XX: allow NULL clock for clk_get_rate
MIPS: Loongson 2F: allow NULL clock for clk_get_rate
MIPS: ralink: allow NULL clock for clk_get_rate
unicore32: allow NULL clock for clk_get_rate
arch/arm/mach-ep93xx/clock.c | 3 +++
arch/arm/mach-mmp/clock.c | 4 +++-
arch/blackfin/mach-bf609/clock.c | 2 +-
arch/m68k/coldfire/clk.c | 3 +++
arch/mips/ar7/clock.c | 3 +++
arch/mips/bcm63xx/clk.c | 3 +++
arch/mips/loongson64/lemote-2f/clock.c | 3 +++
arch/mips/ralink/clk.c | 3 +++
arch/unicore32/kernel/clock.c | 3 +++
9 files changed, 25 insertions(+), 2 deletions(-)
For the whole series:
Reviewed-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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