From: Tudor Ambarus <tudor.ambarus@microchip.com> To: <ludovic.desroches@microchip.com>, <vkoul@kernel.org>, <richard.genoud@gmail.com>, <gregkh@linuxfoundation.org>, <jirislaby@kernel.org> Cc: <nicolas.ferre@microchip.com>, <alexandre.belloni@bootlin.com>, <mripard@kernel.org>, <linux-arm-kernel@lists.infradead.org>, <dmaengine@vger.kernel.org>, <linux-kernel@vger.kernel.org>, <linux-serial@vger.kernel.org>, Tudor Ambarus <tudor.ambarus@microchip.com> Subject: [PATCH v2 06/13] dmaengine: at_xdmac: Fix concurrency over chan's completed_cookie Date: Thu, 25 Nov 2021 11:00:21 +0200 [thread overview] Message-ID: <20211125090028.786832-7-tudor.ambarus@microchip.com> (raw) In-Reply-To: <20211125090028.786832-1-tudor.ambarus@microchip.com> Caller of dma_cookie_complete is expected to hold a lock to prevent concurrency over the channel's completed cookie marker. Fixes: e1f7c9eee707 ("dmaengine: at_xdmac: creation of the atmel eXtended DMA Controller driver") Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com> --- drivers/dma/at_xdmac.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/dma/at_xdmac.c b/drivers/dma/at_xdmac.c index b45ae4fee9db..4d8476845c20 100644 --- a/drivers/dma/at_xdmac.c +++ b/drivers/dma/at_xdmac.c @@ -1703,11 +1703,10 @@ static void at_xdmac_tasklet(struct tasklet_struct *t) } txd = &desc->tx_dma_desc; - + dma_cookie_complete(txd); at_xdmac_remove_xfer(atchan, desc); spin_unlock_irq(&atchan->lock); - dma_cookie_complete(txd); if (txd->flags & DMA_PREP_INTERRUPT) dmaengine_desc_get_callback_invoke(txd, NULL); -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Tudor Ambarus <tudor.ambarus@microchip.com> To: <ludovic.desroches@microchip.com>, <vkoul@kernel.org>, <richard.genoud@gmail.com>, <gregkh@linuxfoundation.org>, <jirislaby@kernel.org> Cc: alexandre.belloni@bootlin.com, Tudor Ambarus <tudor.ambarus@microchip.com>, mripard@kernel.org, linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, dmaengine@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 06/13] dmaengine: at_xdmac: Fix concurrency over chan's completed_cookie Date: Thu, 25 Nov 2021 11:00:21 +0200 [thread overview] Message-ID: <20211125090028.786832-7-tudor.ambarus@microchip.com> (raw) In-Reply-To: <20211125090028.786832-1-tudor.ambarus@microchip.com> Caller of dma_cookie_complete is expected to hold a lock to prevent concurrency over the channel's completed cookie marker. Fixes: e1f7c9eee707 ("dmaengine: at_xdmac: creation of the atmel eXtended DMA Controller driver") Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com> --- drivers/dma/at_xdmac.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/dma/at_xdmac.c b/drivers/dma/at_xdmac.c index b45ae4fee9db..4d8476845c20 100644 --- a/drivers/dma/at_xdmac.c +++ b/drivers/dma/at_xdmac.c @@ -1703,11 +1703,10 @@ static void at_xdmac_tasklet(struct tasklet_struct *t) } txd = &desc->tx_dma_desc; - + dma_cookie_complete(txd); at_xdmac_remove_xfer(atchan, desc); spin_unlock_irq(&atchan->lock); - dma_cookie_complete(txd); if (txd->flags & DMA_PREP_INTERRUPT) dmaengine_desc_get_callback_invoke(txd, NULL); -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-11-25 9:02 UTC|newest] Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-11-25 9:00 [PATCH v2 00/13] dmaengine: at_xdmac: Various fixes Tudor Ambarus 2021-11-25 9:00 ` Tudor Ambarus 2021-11-25 9:00 ` [PATCH v2 01/13] dmaengine: at_xdmac: Don't start transactions at tx_submit level Tudor Ambarus 2021-11-25 9:00 ` Tudor Ambarus 2021-11-25 9:00 ` [PATCH v2 02/13] tty: serial: atmel: Check return code of dmaengine_submit() Tudor Ambarus 2021-11-25 9:00 ` Tudor Ambarus 2021-11-25 9:00 ` [PATCH v2 03/13] tty: serial: atmel: Call dma_async_issue_pending() Tudor Ambarus 2021-11-25 9:00 ` Tudor Ambarus 2021-11-25 9:00 ` [PATCH v2 04/13] dmaengine: at_xdmac: Start transfer for cyclic channels in issue_pending Tudor Ambarus 2021-11-25 9:00 ` Tudor Ambarus 2021-11-25 9:00 ` [PATCH v2 05/13] dmaengine: at_xdmac: Print debug message after realeasing the lock Tudor Ambarus 2021-11-25 9:00 ` Tudor Ambarus 2021-11-25 9:00 ` Tudor Ambarus [this message] 2021-11-25 9:00 ` [PATCH v2 06/13] dmaengine: at_xdmac: Fix concurrency over chan's completed_cookie Tudor Ambarus 2021-11-25 9:00 ` [PATCH v2 07/13] dmaengine: at_xdmac: Fix race for the tx desc callback Tudor Ambarus 2021-11-25 9:00 ` Tudor Ambarus 2021-11-25 9:00 ` [PATCH v2 08/13] dmaengine: at_xdmac: Move the free desc to the tail of the desc list Tudor Ambarus 2021-11-25 9:00 ` Tudor Ambarus 2021-12-13 8:07 ` Vinod Koul 2021-12-13 8:07 ` Vinod Koul 2021-12-13 8:51 ` Tudor.Ambarus 2021-12-13 8:51 ` Tudor.Ambarus 2021-12-13 8:59 ` Vinod Koul 2021-12-13 8:59 ` Vinod Koul 2021-12-13 9:00 ` Vinod Koul 2021-12-13 9:00 ` Vinod Koul 2021-12-13 9:22 ` Tudor.Ambarus 2021-12-13 9:22 ` Tudor.Ambarus 2021-12-13 9:27 ` Tudor.Ambarus 2021-12-13 9:27 ` Tudor.Ambarus 2021-11-25 9:00 ` [PATCH v2 09/13] dmaengine: at_xdmac: Fix concurrency over xfers_list Tudor Ambarus 2021-11-25 9:00 ` Tudor Ambarus 2021-11-25 9:00 ` [PATCH v2 10/13] dmaengine: at_xdmac: Remove a level of indentation in at_xdmac_advance_work() Tudor Ambarus 2021-11-25 9:00 ` Tudor Ambarus 2021-11-25 9:00 ` [PATCH v2 11/13] dmaengine: at_xdmac: Fix lld view setting Tudor Ambarus 2021-11-25 9:00 ` Tudor Ambarus 2021-11-25 9:00 ` [PATCH v2 12/13] dmaengine: at_xdmac: Fix at_xdmac_lld struct definition Tudor Ambarus 2021-11-25 9:00 ` Tudor Ambarus 2021-11-25 9:00 ` [PATCH v2 13/13] dmaengine: at_xdmac: Fix race over irq_status Tudor Ambarus 2021-11-25 9:00 ` Tudor Ambarus
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