md/raid10: fix failure when trying to repair a read error.

commit 055d3747dbf00ce85c6872ecca4d466638e80c22 upstream.

commit 58c54fcca3bac5bf9290cfed31c76e4c4bfbabaf
     md/raid10: handle further errors during fix_read_error better.

in 3.1 added "r10_sync_page_io" which takes an IO size in sectors.
But we were passing the IO size in bytes!!!
This resulting in bio_add_page failing, and empty request being sent
down, and a consequent BUG_ON in scsi_lib.

[fix missing space in error message at same time]

This fix is suitable for 3.1.y and later.

Reported-by: Christian Balzer <chibi@gol.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 3b6756672eff3c2910aaf4931467f1ed53726350..7a9eef64c4f9355e8816721eddceefee66d91efd 100644 (file)
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1919,7 +1919,7 @@ static void fix_read_error(struct r10conf *conf, struct mddev *mddev, struct r10
                        if (r10_sync_page_io(rdev,
                                             r10_bio->devs[sl].addr +
                                             sect,
-                                            s<<9, conf->tmppage, WRITE)
+                                            s, conf->tmppage, WRITE)
                            == 0) {
                                /* Well, this device is dead */
                                printk(KERN_NOTICE
@@ -1956,7 +1956,7 @@ static void fix_read_error(struct r10conf *conf, struct mddev *mddev, struct r10
                        switch (r10_sync_page_io(rdev,
                                             r10_bio->devs[sl].addr +
                                             sect,
-                                            s<<9, conf->tmppage,
+                                            s, conf->tmppage,
                                                 READ)) {
                        case 0:
                                /* Well, this device is dead */
@@ -2119,7 +2119,7 @@ read_more:
        rdev = conf->mirrors[mirror].rdev;
        printk_ratelimited(
                KERN_ERR
-               "md/raid10:%s: %s: redirecting"
+               "md/raid10:%s: %s: redirecting "
                "sector %llu to another mirror\n",
                mdname(mddev),
                bdevname(rdev->bdev, b),