iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

regmap: kunit: fix raw noinc write test wrapping

Browse Source 
The raw noinc write test places a known value in the register following
the noinc register to verify that it is not disturbed by the noinc
write. This test ensures this value is distinct by adding 100 to the
second element of the noinc write data.

The regmap registers are 16-bit, while the test value is stored in an
unsigned int. Therefore, adding 100 may cause the register to wrap while
the test value does not, causing the test to fail. This patch fixes this
by changing val_test and val_last from unsigned int to u16.

Signed-off-by: Ben Wolsieffer <ben.wolsieffer@hefring.com>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Closes: https://lore.kernel.org/linux-kernel/745d3a11-15bc-48b6-84c8-c8761c943bed@roeck-us.net/T/
Tested-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20240206151004.1636761-2-ben.wolsieffer@hefring.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Ben Wolsieffer 2024-02-06 10:10:05 -05:00 committed by Mark Brown
parent 54be6c6c5a
commit 7011b51f13
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/base/regmap/regmap-kunit.c
View File

@ -1202,7 +1202,8 @@ static void raw_noinc_write(struct kunit *test)
struct regmap *map; struct regmap *map;
struct regmap_config config; struct regmap_config config;
struct regmap_ram_data *data; struct regmap_ram_data *data;
unsigned int val, val_test, val_last; unsigned int val;
u16 val_test, val_last;
u16 val_array[BLOCK_TEST_SIZE]; u16 val_array[BLOCK_TEST_SIZE];
config = raw_regmap_config; config = raw_regmap_config;