From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Ujfalusi Subject: [RFC 1/6] dmaengine: core: Allow NULL mask pointer in __dma_device_satisfies_mask() Date: Fri, 27 Nov 2015 10:29:37 +0200 Message-ID: <1448612982-28141-2-git-send-email-peter.ujfalusi@ti.com> References: <1448612982-28141-1-git-send-email-peter.ujfalusi@ti.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1448612982-28141-1-git-send-email-peter.ujfalusi@ti.com> Sender: linux-kernel-owner@vger.kernel.org To: vinod.koul@intel.com, arnd@arndb.de, andy.shevchenko@gmail.com Cc: linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mmc@vger.kernel.org, nsekhar@ti.com List-Id: linux-omap@vger.kernel.org Treat as true condition the case when the mask is NULL. Signed-off-by: Peter Ujfalusi --- drivers/dma/dmaengine.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c index daf54a39bcc7..52c3eee48e2e 100644 --- a/drivers/dma/dmaengine.c +++ b/drivers/dma/dmaengine.c @@ -184,6 +184,9 @@ __dma_device_satisfies_mask(struct dma_device *device, { dma_cap_mask_t has; + if (!want) + return true; + bitmap_and(has.bits, want->bits, device->cap_mask.bits, DMA_TX_TYPE_END); return bitmap_equal(want->bits, has.bits, DMA_TX_TYPE_END); -- 2.6.3