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[188.141.5.72]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48722c6b105sm331466875e9.1.2026.03.28.10.04.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 28 Mar 2026 10:04:14 -0700 (PDT) From: David Carlier To: dan.scally@ideasonboard.com, jacopo.mondi@ideasonboard.com, mchehab@kernel.org Cc: nayden.kanchev@arm.com, hverkuil+cisco@kernel.org, linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, David Carlier Subject: [PATCH v4 1/3] media: mali-c55: add missing of_reserved_mem_device_release() Date: Sat, 28 Mar 2026 17:04:11 +0000 Message-ID: <20260328170411.186973-1-devnexen@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260328151452.148901-1-devnexen@gmail.co> References: <20260328151452.148901-1-devnexen@gmail.co> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit mali_c55_probe() calls of_reserved_mem_device_init() to associate reserved memory regions with the device. This function allocates a struct rmem_assigned_device and adds it to a global linked list, which must be explicitly released via of_reserved_mem_device_release() — there is no devm variant of this API. However, neither the probe error paths nor mali_c55_remove() called of_reserved_mem_device_release(). Any probe failure after the of_reserved_mem_device_init() call, as well as every normal device removal, leaked the reserved memory association on the global list. Fix this by adding an err_release_mem label at the end of the probe error chain and calling of_reserved_mem_device_release() in mali_c55_remove(). The remove teardown order is also corrected to call mali_c55_media_frameworks_deinit() before kfree(), mirroring the probe init order in reverse. Fixes: d5f281f3dd29 ("media: mali-c55: Add Mali-C55 ISP driver") Signed-off-by: David Carlier Reviewed-by: Jacopo Mondi --- drivers/media/platform/arm/mali-c55/mali-c55-core.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/media/platform/arm/mali-c55/mali-c55-core.c b/drivers/media/platform/arm/mali-c55/mali-c55-core.c index c1a562cd214e..5cb59c70ffc9 100644 --- a/drivers/media/platform/arm/mali-c55/mali-c55-core.c +++ b/drivers/media/platform/arm/mali-c55/mali-c55-core.c @@ -806,8 +806,10 @@ static int mali_c55_probe(struct platform_device *pdev) vb2_dma_contig_set_max_seg_size(dev, UINT_MAX); ret = __mali_c55_power_on(mali_c55); - if (ret) - return dev_err_probe(dev, ret, "failed to power on\n"); + if (ret) { + dev_err_probe(dev, ret, "failed to power on\n"); + goto err_release_mem; + } ret = mali_c55_check_hwcfg(mali_c55); if (ret) @@ -846,6 +848,8 @@ static int mali_c55_probe(struct platform_device *pdev) kfree(mali_c55->context.registers); err_power_off: __mali_c55_power_off(mali_c55); +err_release_mem: + of_reserved_mem_device_release(dev); return ret; } @@ -854,8 +858,9 @@ static void mali_c55_remove(struct platform_device *pdev) { struct mali_c55 *mali_c55 = platform_get_drvdata(pdev); - kfree(mali_c55->context.registers); mali_c55_media_frameworks_deinit(mali_c55); + kfree(mali_c55->context.registers); + of_reserved_mem_device_release(&pdev->dev); } static const struct of_device_id mali_c55_of_match[] = { -- 2.53.0