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authorHolger Brunck <holger.brunck@keymile.com>2011-01-24 19:45:42 +0300
committerDavid Woodhouse <David.Woodhouse@intel.com>2011-03-11 17:22:42 +0300
commit771df61949cf2d6ae9ff07e209c80693cdbc9302 (patch)
tree58ce33325000bc7c17832c86a2763aabed665b10 /drivers/mtd/mtdconcat.c
parentcbc6c5e73dfa598b1fa5e67cef28096186e2a7cd (diff)
downloadlinux-771df61949cf2d6ae9ff07e209c80693cdbc9302.tar.xz
mtd: adapt writebufsize calculation for concat
If different chips with different writebufsize are concatenated, the writebufsize from the concat device has to be taken from the device with the largest writebuffer. This writebufsize is used later on in the UBI layer for the min I/O size. Signed-off-by: Holger Brunck <holger.brunck@keymile.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd/mtdconcat.c')
-rw-r--r--drivers/mtd/mtdconcat.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/mtd/mtdconcat.c b/drivers/mtd/mtdconcat.c
index 5f5777bd3f75..5060e608ea5d 100644
--- a/drivers/mtd/mtdconcat.c
+++ b/drivers/mtd/mtdconcat.c
@@ -750,6 +750,7 @@ struct mtd_info *mtd_concat_create(struct mtd_info *subdev[], /* subdevices to c
struct mtd_concat *concat;
uint32_t max_erasesize, curr_erasesize;
int num_erase_region;
+ int max_writebufsize = 0;
printk(KERN_NOTICE "Concatenating MTD devices:\n");
for (i = 0; i < num_devs; i++)
@@ -776,7 +777,12 @@ struct mtd_info *mtd_concat_create(struct mtd_info *subdev[], /* subdevices to c
concat->mtd.size = subdev[0]->size;
concat->mtd.erasesize = subdev[0]->erasesize;
concat->mtd.writesize = subdev[0]->writesize;
- concat->mtd.writebufsize = subdev[0]->writebufsize;
+
+ for (i = 0; i < num_devs; i++)
+ if (max_writebufsize < subdev[i]->writebufsize)
+ max_writebufsize = subdev[i]->writebufsize;
+ concat->mtd.writebufsize = max_writebufsize;
+
concat->mtd.subpage_sft = subdev[0]->subpage_sft;
concat->mtd.oobsize = subdev[0]->oobsize;
concat->mtd.oobavail = subdev[0]->oobavail;