From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.codeaurora.org ([198.145.11.231]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WUteE-0001uQ-Oe for linux-mtd@lists.infradead.org; Tue, 01 Apr 2014 08:02:22 +0000 From: Tanya Brokhman To: dedekind1@gmail.com Subject: [RFC/PATCH] mtd: ubi: Free peb's synchronously for fastmap Date: Tue, 1 Apr 2014 11:01:45 +0300 Message-Id: <1396339305-16005-1-git-send-email-tlinder@codeaurora.org> Cc: linux-mtd@lists.infradead.org, open list , Tanya Brokhman List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , At first mount it's possible that there are not enough free PEBs since there are PEB's pending to be erased. In such scenario, fm_pool (which is the pool from which user required PEBs are allocated) will be empty. Try fixing the above described situation by synchronously performing pending erase work, thus produce another free PEB. Signed-off-by: Tatyana Brokhman diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c index 457ead3..9a36f78 100644 --- a/drivers/mtd/ubi/wl.c +++ b/drivers/mtd/ubi/wl.c @@ -595,10 +595,29 @@ static void refill_wl_pool(struct ubi_device *ubi) static void refill_wl_user_pool(struct ubi_device *ubi) { struct ubi_fm_pool *pool = &ubi->fm_pool; + int err; return_unused_pool_pebs(ubi, pool); for (pool->size = 0; pool->size < pool->max_size; pool->size++) { +retry: + if (!ubi->free.rb_node || + (ubi->free_count - ubi->beb_rsvd_pebs < 1)) { + /* + * There are no available PEBs. Try to free + * PEB by means of synchronous execution of + * pending works. + */ + if (ubi->works_count == 0) + break; + spin_unlock(&ubi->wl_lock); + err = do_work(ubi); + spin_lock(&ubi->wl_lock); + if (err < 0) + break; + goto retry; + } + pool->pebs[pool->size] = __wl_get_peb(ubi); if (pool->pebs[pool->size] < 0) break; -- 1.7.6 -- QUALCOMM ISRAEL, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation