From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from ale.deltatee.com (ale.deltatee.com [204.191.154.188]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 60D8A46C4B1; Tue, 21 Jul 2026 16:10:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=204.191.154.188 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784650204; cv=none; b=NIC9K4OEuK+LU0T3D+eUS+ojzcN50oWCCNEUrvav50kU1c/DubCQXWPy5dMZBwu6wgiI4xnKAXKYfqEYWwS+9kyFp90vC6id0Q4KUKgwfyHKJ7Ka5bwnKPDto3K+QBEfTi04525V7TmuuMAzTozHrCH7J1GNqNQazUp65Fik7lc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784650204; c=relaxed/simple; bh=xYBVJJnXMeuICfOQTBJT12XhDDBX7WyKQarCranQQ3k=; h=From:To:Cc:Date:Message-ID:In-Reply-To:References:MIME-Version: Subject; b=mEGhc3p3PtNQdPBo+ShSZZRjuampVT0XUqmHP1iAl1wOqSO7sWutwlVS+xMNMISjtErN7vlD+REQUj9pNZLp0bJjBNwanx4oKg0LLOcmeTYPJgq90FA+87BU83SRT5qbNwnv2WvSK30loUQlJnt0pOU2OA/msDf4+mgIJGKyGh0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=deltatee.com; spf=pass smtp.mailfrom=deltatee.com; dkim=pass (2048-bit key) header.d=deltatee.com header.i=@deltatee.com header.b=Vuqtkzl/; arc=none smtp.client-ip=204.191.154.188 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=deltatee.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=deltatee.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=deltatee.com header.i=@deltatee.com header.b="Vuqtkzl/" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=deltatee.com; s=20200525; h=Subject:MIME-Version:References:In-Reply-To: Message-ID:Date:Cc:To:From:content-disposition; bh=h36/TpXU9q+PWeF7/dwaoGjY5yGAXiWA4lA7d9GhSrk=; b=Vuqtkzl/OGbGozS2nrv++GaJJO 15AcIySaXqYg20NER5rbNx7eEpNdg1wUfCbPX6f5aKSPhVx7drR6lAQk0hbUCItjjO/gl0QRzqCHD dIstg2PGxtbXnvxii3uJIHJKWJK3gSs3dH3UUQGvyBkQtzKmd5PUGZ0ifKNCdxZUg+vzM/FTFcGtg XtUFr2IyjrUhwUuk9yYNkgVuYyzk9ihhurnFb7sqE6VRJVfq3cslr2Tce2klRB6knYFJgIVVHiiWK xqmyQkmgsvON7AM7ThBcUQ/h1QdOfRxFXrDOL9hLLkgZOSxoQqxNIq4IxSZZQN4w3eFBVqYwlgUr/ aaFIxrgA==; Received: from cgy1-donard.priv.deltatee.com ([172.16.1.31]) by ale.deltatee.com with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1wmD2Y-0000000BodN-1gKC; Tue, 21 Jul 2026 10:09:54 -0600 Received: from gunthorp by cgy1-donard.priv.deltatee.com with local (Exim 4.98.2) (envelope-from ) id 1wmD2U-00000000GBW-0f1P; Tue, 21 Jul 2026 10:09:50 -0600 From: Logan Gunthorpe To: linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, dmaengine@vger.kernel.org, Vinod Koul Cc: Frank Li , Kelvin Cao , =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= , Dave Jiang , George Ge , Jaeyoung Chung , Logan Gunthorpe , Sashiko Date: Tue, 21 Jul 2026 09:57:31 -0600 Message-ID: <20260721155739.62120-5-logang@deltatee.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260721155739.62120-1-logang@deltatee.com> References: <20260721155739.62120-1-logang@deltatee.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 172.16.1.31 X-SA-Exim-Rcpt-To: linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, dmaengine@vger.kernel.org, Frank.li@nxp.com, linux@weissschuh.net, dave.jiang@intel.com, kelvin.cao@microchip.com, george.ge@microchip.com, jjy600901@snu.ac.kr, logang@deltatee.com, vkoul@kernel.org, sashiko-bot@kernel.org X-SA-Exim-Mail-From: gunthorp@deltatee.com X-Spam-Level: Subject: [PATCH v2 04/11] dmaengine: switchtec-dma: fix channel leak on registration failure X-SA-Exim-Version: 4.2.1 (built Sun, 23 Feb 2025 07:57:16 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) switchtec_dma_chans_release() is called in three places but the underlying memory is not freed in all of those places. In order to clean this up, introduce a switchtec_dma_chans_free() helper that will free the memory. Ensure each call to switchtec_dma_chans_release() has a corresponding switchtec_dma_chans_free() call. (The release in switchtec_dma_remove() pairs with the free in switchtec_dma_release()). swdma_dev->chan_cnt is now set to the number of channels that succeeded when one fails to initialise, so switchtec_dma_chans_free() can still be used if not all channels succeed in being allocated. Fixes: 30eba9df76ad ("dmaengine: switchtec-dma: Implement hardware initialization and cleanup") Reported-by: Sashiko Link: https://lore.kernel.org/dmaengine/20260717223024.9BB8A1F000E9@smtp.kernel.org Signed-off-by: Logan Gunthorpe --- drivers/dma/switchtec_dma.c | 25 +++++++++++++++---------- 1 file changed, 15 insertions(+), 10 deletions(-) diff --git a/drivers/dma/switchtec_dma.c b/drivers/dma/switchtec_dma.c index 107769cca772..13efd4189bbb 100644 --- a/drivers/dma/switchtec_dma.c +++ b/drivers/dma/switchtec_dma.c @@ -1176,6 +1176,16 @@ static int switchtec_dma_chans_release(struct pci_dev *pdev, return 0; } +static void switchtec_dma_chans_free(struct switchtec_dma_dev *swdma_dev) +{ + int i; + + for (i = 0; i < swdma_dev->chan_cnt; i++) + kfree(swdma_dev->swdma_chans[i]); + + kfree(swdma_dev->swdma_chans); +} + static int switchtec_dma_chans_enumerate(struct switchtec_dma_dev *swdma_dev, struct pci_dev *pdev, int chan_cnt) { @@ -1201,7 +1211,7 @@ static int switchtec_dma_chans_enumerate(struct switchtec_dma_dev *swdma_dev, if (rc) { dev_err(&pdev->dev, "Channel %d: init channel failed\n", i); - chan_cnt = i; + swdma_dev->chan_cnt = i; goto err_exit; } } @@ -1209,10 +1219,8 @@ static int switchtec_dma_chans_enumerate(struct switchtec_dma_dev *swdma_dev, return chan_cnt; err_exit: - for (i = 0; i < chan_cnt; i++) - switchtec_dma_chan_free(pdev, swdma_dev->swdma_chans[i]); - - kfree(swdma_dev->swdma_chans); + switchtec_dma_chans_release(pdev, swdma_dev); + switchtec_dma_chans_free(swdma_dev); return rc; } @@ -1221,12 +1229,8 @@ static void switchtec_dma_release(struct dma_device *dma_dev) { struct switchtec_dma_dev *swdma_dev = container_of(dma_dev, struct switchtec_dma_dev, dma_dev); - int i; - for (i = 0; i < swdma_dev->chan_cnt; i++) - kfree(swdma_dev->swdma_chans[i]); - - kfree(swdma_dev->swdma_chans); + switchtec_dma_chans_free(swdma_dev); put_device(dma_dev->dev); kfree(swdma_dev); @@ -1317,6 +1321,7 @@ static int switchtec_dma_create(struct pci_dev *pdev) err_chans_release_exit: switchtec_dma_chans_release(pdev, swdma_dev); + switchtec_dma_chans_free(swdma_dev); err_exit: if (swdma_dev->chan_status_irq) -- 2.47.3