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[MTD] CORE mtdchar.c: fix off-by-one error in lseek() 

Allow lseek(mtdchar_fd, 0, SEEK_END) to succeed, which currently fails
with EINVAL.

lseek(fd, 0, SEEK_END) should result into the same fileposition as
lseek(fd, 0, SEEK_SET) + read(fd, buf, length(fd))

Furthermore, lseek(fd, 0, SEEK_CUR) should return the current file position,
which in case of an encountered EOF should not result in EINVAL

Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
This commit is contained in:
Herbert Valerio Riedel 2006-06-24 00:03:36 +02:00 committed by David Woodhouse
parent 0e4ced59de
commit 1887f517e3
1 changed files with 1 additions and 1 deletions
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2
drivers/mtd/mtdchar.c
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@ -78,7 +78,7 @@ static loff_t mtd_lseek (struct file *file, loff_t offset, int orig)
return -EINVAL;
}
if (offset >= 0 && offset < mtd->size)
if (offset >= 0 && offset <= mtd->size)
return file->f_pos = offset;
return -EINVAL;