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mmc: debugfs: remove BUG_ON from mmc_ext_csd_open 

Return error value for file_operations callback instead
of triggering BUG_ON which is meaningless. Personally I
don't believe n != EXT_CSD_STR_LEN could happen. Anyway,
propagate the error to the caller.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Shawn Lin 2016-11-02 15:24:39 +08:00 committed by Ulf Hansson
parent 5df0e8231f
commit a48ee3e65a
1 changed files with 5 additions and 1 deletions
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6
drivers/mmc/core/debugfs.c
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@ -321,7 +321,11 @@ static int mmc_ext_csd_open(struct inode *inode, struct file *filp)
for (i = 0; i < 512; i++)
n += sprintf(buf + n, "%02x", ext_csd[i]);
n += sprintf(buf + n, "\n");
BUG_ON(n != EXT_CSD_STR_LEN);
if (n != EXT_CSD_STR_LEN) {
err = -EINVAL;
goto out_free;
}
filp->private_data = buf;
kfree(ext_csd);