[PATCH] regmap: debugfs: Fix reading in register field units

[PATCH] regmap: debugfs: Fix reading in register field units

[Dimitris Papastamos]

At the moment, if the length of the register field format is
N bytes, we can only get anything meaningful back to userspace
by providing a buffer that is N + 2 bytes large.  Fix this
so we that we only need to provide a buffer of N bytes.

Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
---
 drivers/base/regmap/regmap-debugfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c
index 0445f2f..96990d2 100644
--- a/drivers/base/regmap/regmap-debugfs.c
+++ b/drivers/base/regmap/regmap-debugfs.c
@@ -187,7 +187,7 @@ static ssize_t regmap_map_read_file(struct file *file, char __user *user_buf,
 		/* If we're in the region the user is trying to read */
 		if (p >= *ppos) {
 			/* ...but not beyond it */
-			if (buf_pos + 1 + map->debugfs_tot_len >= count)
+			if (buf_pos + map->debugfs_tot_len > count)
 				break;
 
 			/* Format the register */
-- 
1.8.1.2

Re: [PATCH] regmap: debugfs: Fix reading in register field units

[Mark Brown]

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On Thu, Feb 07, 2013 at 10:51:56AM +0000, Dimitris Papastamos wrote:
> At the moment, if the length of the register field format is
> N bytes, we can only get anything meaningful back to userspace
> by providing a buffer that is N + 2 bytes large.  Fix this
> so we that we only need to provide a buffer of N bytes.

Applied, thanks.

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