From 48cc661e7f4cec80b6aa894cc6902c292f201ea8 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Mon, 28 Dec 2015 13:02:47 -0700 Subject: null_blk: use async queue restart helper If null_blk is run in NULL_IRQ_TIMER mode and with queue_mode NULL_Q_RQ, we need to restart the queue from the hrtimer interrupt. We can't directly invoke the request_fn from that context, so punt the queue run to async kblockd context. Tested-by: Rabin Vincent Signed-off-by: Jens Axboe --- drivers/block/null_blk.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) (limited to 'drivers') diff --git a/drivers/block/null_blk.c b/drivers/block/null_blk.c index a428e4ef71fd..09e3c0d87ecc 100644 --- a/drivers/block/null_blk.c +++ b/drivers/block/null_blk.c @@ -232,20 +232,19 @@ static void end_cmd(struct nullb_cmd *cmd) break; case NULL_Q_BIO: bio_endio(cmd->bio); - goto free_cmd; + break; } + free_cmd(cmd); + /* Restart queue if needed, as we are freeing a tag */ - if (q && !q->mq_ops && blk_queue_stopped(q)) { + if (queue_mode == NULL_Q_RQ && blk_queue_stopped(q)) { unsigned long flags; spin_lock_irqsave(q->queue_lock, flags); - if (blk_queue_stopped(q)) - blk_start_queue(q); + blk_start_queue_async(q); spin_unlock_irqrestore(q->queue_lock, flags); } -free_cmd: - free_cmd(cmd); } static enum hrtimer_restart null_cmd_timer_expired(struct hrtimer *timer) -- cgit v1.2.3 From c3293a9ac2a4f9160b85b5e986a8e0c54986e7f7 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Matias=20Bj=C3=B8rling?= Date: Tue, 29 Dec 2015 14:37:56 +0100 Subject: lightnvm: wrong offset in bad blk lun calculation MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit dev->nr_luns reports the total number of luns available in a device while dev->luns_per_chnl is the number of luns per channel. When multiple channels are available, the offset is calculated from a channel and lun id into a linear array. As it multiplies with the total number of luns, we go out of bound when channel id > 0 and causes the kernel to panic when we read a protected kernel memory area. Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe --- drivers/lightnvm/gennvm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c index f434e89e1c7a..a54b339951a3 100644 --- a/drivers/lightnvm/gennvm.c +++ b/drivers/lightnvm/gennvm.c @@ -75,7 +75,7 @@ static int gennvm_block_bb(struct ppa_addr ppa, int nr_blocks, u8 *blks, struct nvm_block *blk; int i; - lun = &gn->luns[(dev->nr_luns * ppa.g.ch) + ppa.g.lun]; + lun = &gn->luns[(dev->luns_per_chnl * ppa.g.ch) + ppa.g.lun]; for (i = 0; i < nr_blocks; i++) { if (blks[i] == 0) -- cgit v1.2.3