From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 D3FAE21C166; Thu, 12 Dec 2024 17:03:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734023033; cv=none; b=Uujh4QGzYE3jjKDMUWYDUY7zWxv3xA1TRvkc4xOCrQENkJlGeir2Q2pY266NJ4NVsCVhUyGB39/QzA9ftkQdEcU6QWNzUQhGMV7OdLp0Ac47khk4YmeYRzNc4s6mVbEmNfmQHAHBMfgqGjLIBJzcZGbJPtoaOPrllEd/uv0gbLc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734023033; c=relaxed/simple; bh=y0dEE7Po0bPI4CKLIj+sasLDcpefXnIe+P7AORulU2c=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=fL7joRfHRWO7myVi8cdh+f9Iu0KG90GTX0cRzV6BmkqYoXHiAisJJROUEvR0kfvitR4wPrwMWJy/cChnlrlaGRznTKnAWJbLDYzcB0ipHcdLrrmXtFCG34rSs3V3xxnEMfZSSjoEMMLJGLgCmftIl4Q+71f+PpYl1zLLiOgAvrE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=trWfntwD; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="trWfntwD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id F423DC4CECE; Thu, 12 Dec 2024 17:03:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1734023033; bh=y0dEE7Po0bPI4CKLIj+sasLDcpefXnIe+P7AORulU2c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=trWfntwDemy0JEF1LqAhveYvBd5QGLkfJo7qm/hq9mjFC2vF5Ucj+IlEdfrxBSSfi gx+lSdUKOamC+i2azRc/gM5laTpsSc3ebFHbbJXZFuzyKg7bUxsxQYrr5F+oIG1zQT QFczAc4VPeMkykHe9DhbZf39W2I7GxCqmbxGfVEQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Dario Binacchi , Marc Kleine-Budde , Sasha Levin Subject: [PATCH 5.15 402/565] can: c_can: c_can_handle_bus_err(): update statistics if skb allocation fails Date: Thu, 12 Dec 2024 15:59:57 +0100 Message-ID: <20241212144327.543302591@linuxfoundation.org> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241212144311.432886635@linuxfoundation.org> References: <20241212144311.432886635@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dario Binacchi [ Upstream commit 9e66242504f49e17481d8e197730faba7d99c934 ] Ensure that the statistics are always updated, even if the skb allocation fails. Fixes: 4d6d26537940 ("can: c_can: fix {rx,tx}_errors statistics") Signed-off-by: Dario Binacchi Link: https://patch.msgid.link/20241122221650.633981-2-dario.binacchi@amarulasolutions.com Signed-off-by: Marc Kleine-Budde Signed-off-by: Sasha Levin --- drivers/net/can/c_can/c_can_main.c | 26 +++++++++++++++++--------- 1 file changed, 17 insertions(+), 9 deletions(-) diff --git a/drivers/net/can/c_can/c_can_main.c b/drivers/net/can/c_can/c_can_main.c index d9595eb3e125f..875ac76bc5fdd 100644 --- a/drivers/net/can/c_can/c_can_main.c +++ b/drivers/net/can/c_can/c_can_main.c @@ -1022,49 +1022,57 @@ static int c_can_handle_bus_err(struct net_device *dev, /* propagate the error condition to the CAN stack */ skb = alloc_can_err_skb(dev, &cf); - if (unlikely(!skb)) - return 0; /* check for 'last error code' which tells us the * type of the last error to occur on the CAN bus */ - cf->can_id |= CAN_ERR_PROT | CAN_ERR_BUSERROR; + if (likely(skb)) + cf->can_id |= CAN_ERR_PROT | CAN_ERR_BUSERROR; switch (lec_type) { case LEC_STUFF_ERROR: netdev_dbg(dev, "stuff error\n"); - cf->data[2] |= CAN_ERR_PROT_STUFF; + if (likely(skb)) + cf->data[2] |= CAN_ERR_PROT_STUFF; stats->rx_errors++; break; case LEC_FORM_ERROR: netdev_dbg(dev, "form error\n"); - cf->data[2] |= CAN_ERR_PROT_FORM; + if (likely(skb)) + cf->data[2] |= CAN_ERR_PROT_FORM; stats->rx_errors++; break; case LEC_ACK_ERROR: netdev_dbg(dev, "ack error\n"); - cf->data[3] = CAN_ERR_PROT_LOC_ACK; + if (likely(skb)) + cf->data[3] = CAN_ERR_PROT_LOC_ACK; stats->tx_errors++; break; case LEC_BIT1_ERROR: netdev_dbg(dev, "bit1 error\n"); - cf->data[2] |= CAN_ERR_PROT_BIT1; + if (likely(skb)) + cf->data[2] |= CAN_ERR_PROT_BIT1; stats->tx_errors++; break; case LEC_BIT0_ERROR: netdev_dbg(dev, "bit0 error\n"); - cf->data[2] |= CAN_ERR_PROT_BIT0; + if (likely(skb)) + cf->data[2] |= CAN_ERR_PROT_BIT0; stats->tx_errors++; break; case LEC_CRC_ERROR: netdev_dbg(dev, "CRC error\n"); - cf->data[3] = CAN_ERR_PROT_LOC_CRC_SEQ; + if (likely(skb)) + cf->data[3] = CAN_ERR_PROT_LOC_CRC_SEQ; stats->rx_errors++; break; default: break; } + if (unlikely(!skb)) + return 0; + netif_receive_skb(skb); return 1; } -- 2.43.0