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drm/i915: work around false-positive maybe-uninitialized warning 

gcc-9 gets confused by the code flow in check_dirty_whitelist:

drivers/gpu/drm/i915/gt/selftest_workarounds.c: In function 'check_dirty_whitelist':
drivers/gpu/drm/i915/gt/selftest_workarounds.c:492:17: error: 'rsvd' may be used uninitialized in this function [-Werror=maybe-uninitialized]

I could not figure out a good way to do this in a way that gcc
understands better, so initialize the variable to zero, as last
resort.

Fixes: aee20aaed8 ("drm/i915: Implement read-only support in whitelist selftest")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20200527140526.1458215-2-arnd@arndb.de
(cherry picked from commit cc649a9eaf)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
This commit is contained in:
Arnd Bergmann 2020-05-27 16:05:09 +02:00 committed by Joonas Lahtinen
parent 54a9adc460
commit 70cac501b5
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/i915/gt/selftest_workarounds.c
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@ -623,6 +623,8 @@ static int check_dirty_whitelist(struct intel_context *ce)
err = -EINVAL;
goto out_unpin;
}
} else {
rsvd = 0;
}
expect = results[0];