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[MTD] mtdchar: Return EINVAL for bad seeks instead of fixing up to valid byte

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mtdchar return -EINVAL for seek prior to offset 0 or to beyond the last
byte in the device/partition, similar to various other seek methods,
instead of fixing up to first or last byte.

Signed-off-by: Todd Poynor <tpoynor@mvista.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Todd Poynor 2005-08-04 02:05:51 +01:00 committed by Thomas Gleixner
parent 1da2c9a638
commit 8b491d7508
1 changed files with 6 additions and 9 deletions
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15
drivers/mtd/mtdchar.c
View file

@ -1,5 +1,5 @@
/* /*
* $Id: mtdchar.c,v 1.73 2005/07/04 17:36:41 gleixner Exp $ * $Id: mtdchar.c,v 1.74 2005/08/04 01:05:48 tpoynor Exp $
* *
* Character-device access to raw MTD devices. * Character-device access to raw MTD devices.
* *
@ -69,26 +69,23 @@ static loff_t mtd_lseek (struct file *file, loff_t offset, int orig)
switch (orig) { switch (orig) {
case 0: case 0:
/* SEEK_SET */ /* SEEK_SET */
file->f_pos = offset;
break; break;
case 1: case 1:
/* SEEK_CUR */ /* SEEK_CUR */
file->f_pos += offset; offset += file->f_pos;
break; break;
case 2: case 2:
/* SEEK_END */ /* SEEK_END */
file->f_pos =mtd->size + offset; offset += mtd->size;
break; break;
default: default:
return -EINVAL; return -EINVAL;
} }
if (file->f_pos < 0) if (offset >= 0 && offset < mtd->size)
file->f_pos = 0; return file->f_pos = offset;
else if (file->f_pos >= mtd->size)
file->f_pos = mtd->size - 1;
return file->f_pos; return -EINVAL;
} }