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regmap: debugfs: Check return value of regmap_write()

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Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Dimitris Papastamos 2013-05-09 12:46:41 +01:00 committed by Mark Brown
parent f722406faa
commit 68e850d80d
1 changed files with 4 additions and 1 deletions
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5
drivers/base/regmap/regmap-debugfs.c
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@ -265,6 +265,7 @@ static ssize_t regmap_map_write_file(struct file *file,
char *start = buf; char *start = buf;
unsigned long reg, value; unsigned long reg, value;
struct regmap *map = file->private_data; struct regmap *map = file->private_data;
int ret;
buf_size = min(count, (sizeof(buf)-1)); buf_size = min(count, (sizeof(buf)-1));
if (copy_from_user(buf, user_buf, buf_size)) if (copy_from_user(buf, user_buf, buf_size))
@ -282,7 +283,9 @@ static ssize_t regmap_map_write_file(struct file *file,
/* Userspace has been fiddling around behind the kernel's back */ /* Userspace has been fiddling around behind the kernel's back */
add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE); add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE);
regmap_write(map, reg, value); ret = regmap_write(map, reg, value);
if (ret < 0)
return ret;
return buf_size; return buf_size;
} }
#else #else