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media: camss: csiphy-3ph: avoid undefined behavior

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Marking a case of the switch statement as unreachable means the
compiler treats it as undefined behavior, which is then caught by
an objtool warning:

drivers/media/platform/qcom/camss/camss-csiphy-3ph-1-0.o: warning: objtool: csiphy_lanes_enable() falls through to next function csiphy_lanes_disable()

Instead of simply continuing execution at a random place of the
driver, print a warning and return from to the caller, which
makes it possible to understand what happens and avoids the
warning.

Fixes: 53655d2a0f ("media: camss: csiphy-3ph: add support for SM8250 CSI DPHY")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Robert Foss <robert.foss@linaro.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This commit is contained in:
Arnd Bergmann 2022-12-15 17:28:46 +01:00 committed by Mauro Carvalho Chehab
parent c58bddb1d7
commit 05fb9ace34
1 changed files with 2 additions and 1 deletions
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3
drivers/media/platform/qcom/camss/camss-csiphy-3ph-1-0.c
View file

@ -429,7 +429,8 @@ static void csiphy_gen2_config_lanes(struct csiphy_device *csiphy,
array_size = ARRAY_SIZE(lane_regs_sm8250[0]);
break;
default:
unreachable();
WARN(1, "unknown cspi version\n");
return;
}
for (l = 0; l < 5; l++) {