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lseek: ensure errno is set on failure and return -1 

All error paths before calling the driver's lseek callback return -1 and
set errno. Do the same if the callback returns an error.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Uwe Kleine-König 2017-02-23 22:28:41 +01:00 committed by Sascha Hauer
parent fc6ce94cda
commit 711bb18961
1 changed files with 7 additions and 1 deletions
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8
fs/fs.c
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@ -926,7 +926,13 @@ loff_t lseek(int fildes, loff_t offset, int whence)
goto out;
}
return fsdrv->lseek(&f->fsdev->dev, f, pos);
pos = fsdrv->lseek(&f->fsdev->dev, f, pos);
if (pos < 0) {
errno = -pos;
return -1;
}
return pos;
out:
if (ret)