From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail.phycard.co.uk ([217.6.246.34] helo=root.phytec.de) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1b6CT2-0004il-OV for barebox@lists.infradead.org; Fri, 27 May 2016 07:46:02 +0000 Received: from idefix.phytec.de (idefix.phytec.de [172.16.0.10]) by root.phytec.de (Postfix) with ESMTP id D3E05A00AA0 for ; Fri, 27 May 2016 09:46:37 +0200 (CEST) From: Teresa Remmet Date: Fri, 27 May 2016 09:43:57 +0200 Message-Id: <1464335095-35180-5-git-send-email-t.remmet@phytec.de> In-Reply-To: <1464335095-35180-1-git-send-email-t.remmet@phytec.de> References: <1464335095-35180-1-git-send-email-t.remmet@phytec.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH v2 04/62] UBI: wl: Rename cancel flag to shutdown To: barebox@lists.infradead.org From: Richard Weinberger It confused me more than once that the cancel flag of the work function does not indicate the cancellation of a single work. In fact it indicates the WL sub-system shutdown and therefore worker functions have to free their wl_entries too. That's why you cannot cancel a single work, you can only shutdown all works. Signed-off-by: Richard Weinberger Signed-off-by: Artem Bityutskiy Signed-off-by: Teresa Remmet --- drivers/mtd/ubi/ubi.h | 9 +++++---- drivers/mtd/ubi/wl.c | 24 +++++++++++++----------- 2 files changed, 18 insertions(+), 15 deletions(-) diff --git a/drivers/mtd/ubi/ubi.h b/drivers/mtd/ubi/ubi.h index 51a0112..df104db 100644 --- a/drivers/mtd/ubi/ubi.h +++ b/drivers/mtd/ubi/ubi.h @@ -691,14 +691,15 @@ struct ubi_attach_info { * @torture: if the physical eraseblock has to be tortured * @anchor: produce a anchor PEB to by used by fastmap * - * The @func pointer points to the worker function. If the @cancel argument is - * not zero, the worker has to free the resources and exit immediately. The - * worker has to return zero in case of success and a negative error code in + * The @func pointer points to the worker function. If the @shutdown argument is + * not zero, the worker has to free the resources and exit immediately as the + * WL sub-system is shutting down. + * The worker has to return zero in case of success and a negative error code in * case of failure. */ struct ubi_work { struct list_head list; - int (*func)(struct ubi_device *ubi, struct ubi_work *wrk, int cancel); + int (*func)(struct ubi_device *ubi, struct ubi_work *wrk, int shutdown); /* The below fields are only relevant to erasure works */ struct ubi_wl_entry *e; int vol_id; diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c index cb2f9d7..cdfc41c0 100644 --- a/drivers/mtd/ubi/wl.c +++ b/drivers/mtd/ubi/wl.c @@ -816,7 +816,7 @@ static void schedule_ubi_work(struct ubi_device *ubi, struct ubi_work *wrk) } static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk, - int cancel); + int shutdown); #ifdef CONFIG_MTD_UBI_FASTMAP /** @@ -939,14 +939,15 @@ int ubi_wl_put_fm_peb(struct ubi_device *ubi, struct ubi_wl_entry *fm_e, * wear_leveling_worker - wear-leveling worker function. * @ubi: UBI device description object * @wrk: the work object - * @cancel: non-zero if the worker has to free memory and exit + * @shutdown: non-zero if the worker has to free memory and exit + * because the WL-subsystem is shutting down * * This function copies a more worn out physical eraseblock to a less worn out * one. Returns zero in case of success and a negative error code in case of * failure. */ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk, - int cancel) + int shutdown) { int err, scrubbing = 0, torture = 0, protect = 0, erroneous = 0; int vol_id = -1, uninitialized_var(lnum); @@ -957,7 +958,7 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk, struct ubi_vid_hdr *vid_hdr; kfree(wrk); - if (cancel) + if (shutdown) return 0; vid_hdr = ubi_zalloc_vid_hdr(ubi, GFP_NOFS); @@ -1333,7 +1334,8 @@ int ubi_ensure_anchor_pebs(struct ubi_device *ubi) * erase_worker - physical eraseblock erase worker function. * @ubi: UBI device description object * @wl_wrk: the work object - * @cancel: non-zero if the worker has to free memory and exit + * @shutdown: non-zero if the worker has to free memory and exit + * because the WL sub-system is shutting down * * This function erases a physical eraseblock and perform torture testing if * needed. It also takes care about marking the physical eraseblock bad if @@ -1341,7 +1343,7 @@ int ubi_ensure_anchor_pebs(struct ubi_device *ubi) * failure. */ static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk, - int cancel) + int shutdown) { struct ubi_wl_entry *e = wl_wrk->e; int pnum = e->pnum; @@ -1349,7 +1351,7 @@ static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk, int lnum = wl_wrk->lnum; int err, available_consumed = 0; - if (cancel) { + if (shutdown) { dbg_wl("cancel erasure of PEB %d EC %d", pnum, e->ec); kfree(wl_wrk); kfree(e); @@ -1667,10 +1669,10 @@ static void tree_destroy(struct rb_root *root) } /** - * cancel_pending - cancel all pending works. + * shutdown_work - shutdown all pending works. * @ubi: UBI device description object */ -static void cancel_pending(struct ubi_device *ubi) +static void shutdown_work(struct ubi_device *ubi) { while (!list_empty(&ubi->works)) { struct ubi_work *wrk; @@ -1807,7 +1809,7 @@ int ubi_wl_init(struct ubi_device *ubi, struct ubi_attach_info *ai) return 0; out_free: - cancel_pending(ubi); + shutdown_work(ubi); tree_destroy(&ubi->used); tree_destroy(&ubi->free); tree_destroy(&ubi->scrub); @@ -1839,7 +1841,7 @@ static void protection_queue_destroy(struct ubi_device *ubi) void ubi_wl_close(struct ubi_device *ubi) { dbg_wl("close the WL sub-system"); - cancel_pending(ubi); + shutdown_work(ubi); protection_queue_destroy(ubi); tree_destroy(&ubi->used); tree_destroy(&ubi->erroneous); -- 1.9.1 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox