Messages in this thread Patch in this message | | | Subject | [PATCH 4/9] mtd-make mtdtrans thread suspend friendly | From | Maxim Levitsky <> | Date | Wed, 06 Jan 2010 23:48:05 +0200 |
| |
>From 23892d5e002d63b7980742fa5445443547fcf8cf Mon Sep 17 00:00:00 2001 From: Maxim Levitsky <maximlevitsky@gmail.com> Date: Tue, 5 Jan 2010 23:25:19 +0200 Subject: [PATCH 4/9] mtd-make mtdtrans thread suspend friendly
Signed-of-by: Maxim Levitsky <maximlevitsky@gmail.com> --- drivers/mtd/mtd_blkdevs.c | 15 +++++++-------- 1 files changed, 7 insertions(+), 8 deletions(-)
diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c index 6af4673..7070d35 100644 --- a/drivers/mtd/mtd_blkdevs.c +++ b/drivers/mtd/mtd_blkdevs.c @@ -20,6 +20,7 @@ #include <linux/init.h> #include <linux/mutex.h> #include <linux/kthread.h> +#include <linux/freezer.h> #include <asm/uaccess.h> #include "mtdcore.h" @@ -79,37 +80,35 @@ static int mtd_blktrans_thread(void *arg) /* we might get involved when memory gets low, so use PF_MEMALLOC */ current->flags |= PF_MEMALLOC; - - spin_lock_irq(rq->queue_lock); + set_freezable(); while (!kthread_should_stop()) { int res; + try_to_freeze(); + + spin_lock_irq(rq->queue_lock); if (!req && !(req = blk_fetch_request(rq))) { set_current_state(TASK_INTERRUPTIBLE); spin_unlock_irq(rq->queue_lock); schedule(); - spin_lock_irq(rq->queue_lock); continue; } - spin_unlock_irq(rq->queue_lock); + mutex_lock(&dev->lock); res = do_blktrans_request(dev->tr, dev, req); mutex_unlock(&dev->lock); spin_lock_irq(rq->queue_lock); - if (!__blk_end_request_cur(req, res)) req = NULL; + spin_unlock_irq(rq->queue_lock); } if (req) __blk_end_request_all(req, -EIO); - - spin_unlock_irq(rq->queue_lock); - return 0; } -- 1.6.3.3
| |