From 30fa98480b782999248ce8290136aa58f22536cf Mon Sep 17 00:00:00 2001 From: Artem Bityutskiy Date: Thu, 29 Dec 2011 15:16:28 +0200 Subject: mtd: remove extra retlen assignment MTD functions always assign the 'retlen' argument to 0 at the very beginning - the callers do not have to do this. I used the following semantic patch to find these places: @@ identifier retlen; expression a, b, c, d, e; constant C; type T; @@ ( - retlen = C; | T -retlen = C + retlen ; ) ... when != retlen when exists ( mtd_read(a, b, c, &retlen, d) | mtd_write(a, b, c, &retlen, d) | mtd_panic_write(a, b, c, &retlen, d) | mtd_point(a, b, c, &retlen, d, e) | mtd_read_fact_prot_reg(a, b, c, &retlen, d) | mtd_write_user_prot_reg(a, b, c, &retlen, d) | mtd_read_user_prot_reg(a, b, c, &retlen, d) | mtd_writev(a, b, c, d, &retlen) ) I ran it twice, because there were cases of double zero assigments in mtd tests. Then I went through the patch to verify that spatch did not find any false positives. Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse --- drivers/mtd/mtdchar.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/mtd/mtdchar.c') diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c index 15a3f6224be4..83b0c82e9c94 100644 --- a/drivers/mtd/mtdchar.c +++ b/drivers/mtd/mtdchar.c @@ -189,7 +189,7 @@ static ssize_t mtdchar_read(struct file *file, char __user *buf, size_t count, { struct mtd_file_info *mfi = file->private_data; struct mtd_info *mtd = mfi->mtd; - size_t retlen=0; + size_t retlen; size_t total_retlen=0; int ret=0; int len; -- cgit v1.2.3-55-g7522