A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-28 18:51:56 -04:00
Code Issues Projects Releases Packages Wiki Activity

lightnvm: pblk: prevent premature sync point resets

Browse source 
Unless we protect flush pointer updates with a lock, we risk
resetting new flush points before we've synced all sectors
up to that point.

This patch protects new flush points with the same spin lock
that is being held when advancing the sync pointer and
resetting completed flush points.

Signed-off-by: Hans Holmberg <[email protected]>
Signed-off-by: Javier González <[email protected]>
Signed-off-by: Matias Bjørling <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Hans Holmberg 2018-01-05 14:16:11 +01:00 • committed by Jens Axboe
commit b36bbf9d4f
1 changed files with 6 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

12
drivers/lightnvm/pblk-rb.c
View file

@ -367,17 +367,17 @@ static int pblk_rb_flush_point_set(struct pblk_rb *rb, struct bio *bio,
flush_point = (pos == 0) ? (rb->nr_entries - 1) : (pos - 1);
entry = &rb->entries[flush_point];
pblk_rb_sync_init(rb, NULL);
/* Protect flush points */
smp_store_release(&rb->flush_point, flush_point);
if (!bio)
return 0;
if (bio)
bio_list_add(&entry->w_ctx.bios, bio);
spin_lock_irq(&rb->s_lock);
bio_list_add(&entry->w_ctx.bios, bio);
spin_unlock_irq(&rb->s_lock);
pblk_rb_sync_end(rb, NULL);
return 1;
return bio ? 1 : 0;
}
static int __pblk_rb_may_write(struct pblk_rb *rb, unsigned int nr_entries,