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[MTD] mtdpart.c: Allow eraseblock size != power of 2 

Don't assume eraseblock size is power of 2.
Dataflash can have aligned eraseblock size.

From: Peter Menzebach <pm-mtd@mw-itcon.de>
Acked-by: Artem B. Bityutskiy <dedekind@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Artem B. Bityutskiy 2005-09-30 15:49:12 +01:00 committed by Thomas Gleixner
parent daba5cc4bc
commit 5cea5dadfe
1 changed files with 5 additions and 4 deletions
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9
drivers/mtd/mtdpart.c
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@ -5,7 +5,7 @@
*
* This code is GPL
*
* $Id: mtdpart.c,v 1.53 2005/02/08 17:11:13 nico Exp $
* $Id: mtdpart.c,v 1.54 2005/09/30 14:49:08 dedekind Exp $
*
* 02-21-2002 Thomas Gleixner <gleixner@autronix.de>
* added support for read_oob, write_oob
@ -465,9 +465,10 @@ int add_mtd_partitions(struct mtd_info *master,
if (slave->offset == MTDPART_OFS_APPEND)
slave->offset = cur_offset;
if (slave->offset == MTDPART_OFS_NXTBLK) {
u_int32_t emask = master->erasesize-1;
slave->offset = (cur_offset + emask) & ~emask;
if (slave->offset != cur_offset) {
slave->offset = cur_offset;
if ((cur_offset % master->erasesize) != 0) {
/* Round up to next erasesize */
slave->offset = ((cur_offset / master->erasesize) + 1) * master->erasesize;
printk(KERN_NOTICE "Moving partition %d: "
"0x%08x -> 0x%08x\n", i,
cur_offset, slave->offset);