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Fri, 17 Jul 2026 18:05:13 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A7CF91F00A3A; Fri, 17 Jul 2026 18:05:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1784311512; bh=bAt2B2DVBX4/RIpHNlO5/JDoLwNz0B6Ol+c72/5t3UA=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=MzFNHvroNpxLssZqtDE/XzisYnpfZTw7q6hhmN2FsH0HM/1K/Ck03+b4yToNC8BFM e2nA1/X53VCAdYAxXw0SpVBiFy+pf7EIeTE2TpOdwjEH/ygihfaxBJCDyTzPtLrb1g YolAHpsYonN2KOcRj8XToi826MiewgqkOV/JdJjq4YkJKobLWq1dhIwERvSGWisdNG 9ybxIL7Jy3VwIv4BiWyZXwMg6tO3CS6lg5VMd8zQqB+TOKMAJLfYmHSNXlnX77aLLN gyP+uY2DSl4GnAX+BGqUfp6M3HsonmcxJW7+SCrE4u9yROwK9SY8UzlKT2Ca0XN6rk s4/02TpbIKBsg== From: "Aneesh Kumar K.V (Arm)" To: iommu@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-coco@lists.linux.dev Cc: "Aneesh Kumar K.V (Arm)" , Robin Murphy , Marek Szyprowski , Will Deacon , Marc Zyngier , Steven Price , Suzuki K Poulose , Catalin Marinas , Jiri Pirko , Jason Gunthorpe , Mostafa Saleh , Petr Tesarik , Alexey Kardashevskiy , Dan Williams , Xu Yilun , linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , "Christophe Leroy (CS GROUP)" , Alexander Gordeev , Gerald Schaefer , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Sven Schnelle , x86@kernel.org, stable@vger.kernel.org, Michael Kelley , Jason Gunthorpe Subject: [PATCH v8 01/23] dma-direct: return struct page from dma_direct_alloc_from_pool() Date: Fri, 17 Jul 2026 23:34:19 +0530 Message-ID: <20260717180442.110954-2-aneesh.kumar@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260717180442.110954-1-aneesh.kumar@kernel.org> References: <20260717180442.110954-1-aneesh.kumar@kernel.org> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Commit 5b138c534fda ("dma-direct: factor out a dma_direct_alloc_from_pool helper") changed dma_direct_alloc_from_pool() to return the CPU address from dma_alloc_from_pool(). That fits dma_direct_alloc(), but dma_direct_alloc_pages() also uses the helper and expects a struct page *. Fix this by making dma_direct_alloc_from_pool() return the struct page * again, and pass the CPU address back through an out-parameter for the dma_direct_alloc() caller. Fixes: 5b138c534fda ("dma-direct: factor out a dma_direct_alloc_from_pool helper") Cc: stable@vger.kernel.org Tested-by: Michael Kelley Tested-by: Mostafa Saleh Reviewed-by: Jason Gunthorpe Signed-off-by: Aneesh Kumar K.V (Arm) --- kernel/dma/direct.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c index d8219efe3273..363d984d90e7 100644 --- a/kernel/dma/direct.c +++ b/kernel/dma/direct.c @@ -164,22 +164,21 @@ static bool dma_direct_use_pool(struct device *dev, gfp_t gfp) return !gfpflags_allow_blocking(gfp) && !is_swiotlb_for_alloc(dev); } -static void *dma_direct_alloc_from_pool(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t gfp) +static struct page *dma_direct_alloc_from_pool(struct device *dev, size_t size, + dma_addr_t *dma_handle, void **cpu_addr, gfp_t gfp) { struct page *page; u64 phys_limit; - void *ret; if (WARN_ON_ONCE(!IS_ENABLED(CONFIG_DMA_COHERENT_POOL))) return NULL; gfp |= dma_direct_optimal_gfp_mask(dev, &phys_limit); - page = dma_alloc_from_pool(dev, size, &ret, gfp, dma_coherent_ok); + page = dma_alloc_from_pool(dev, size, cpu_addr, gfp, dma_coherent_ok); if (!page) return NULL; *dma_handle = phys_to_dma_direct(dev, page_to_phys(page)); - return ret; + return page; } static void *dma_direct_alloc_no_mapping(struct device *dev, size_t size, @@ -247,8 +246,11 @@ void *dma_direct_alloc(struct device *dev, size_t size, * the atomic pools instead if we aren't allowed block. */ if ((remap || force_dma_unencrypted(dev)) && - dma_direct_use_pool(dev, gfp)) - return dma_direct_alloc_from_pool(dev, size, dma_handle, gfp); + dma_direct_use_pool(dev, gfp)) { + page = dma_direct_alloc_from_pool(dev, size, dma_handle, + &ret, gfp); + return page ? ret : NULL; + } /* we always manually zero the memory once we are done */ page = __dma_direct_alloc_pages(dev, size, gfp & ~__GFP_ZERO, true); @@ -357,7 +359,7 @@ struct page *dma_direct_alloc_pages(struct device *dev, size_t size, void *ret; if (force_dma_unencrypted(dev) && dma_direct_use_pool(dev, gfp)) - return dma_direct_alloc_from_pool(dev, size, dma_handle, gfp); + return dma_direct_alloc_from_pool(dev, size, dma_handle, &ret, gfp); page = __dma_direct_alloc_pages(dev, size, gfp, false); if (!page) -- 2.43.0