From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966985AbbBDQsw (ORCPT ); Wed, 4 Feb 2015 11:48:52 -0500 Received: from mout.web.de ([212.227.17.12]:49379 "EHLO mout.web.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754766AbbBDQsu (ORCPT ); Wed, 4 Feb 2015 11:48:50 -0500 Message-ID: <54D24D6A.2020404@users.sourceforge.net> Date: Wed, 04 Feb 2015 17:48:42 +0100 From: SF Markus Elfring User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 MIME-Version: 1.0 To: Kalle Valo , Solomon Peachy , netdev@vger.kernel.org, linux-wireless@vger.kernel.org CC: LKML , kernel-janitors@vger.kernel.org, Julia Lawall Subject: [PATCH 2/2] CW1200: Less function calls in cw1200_load_firmware_cw1200() after error detection References: <5307CAA2.8060406@users.sourceforge.net> <530A086E.8010901@users.sourceforge.net> <530A72AA.3000601@users.sourceforge.net> <530B5FB6.6010207@users.sourceforge.net> <530C5E18.1020800@users.sourceforge.net> <530CD2C4.4050903@users.sourceforge.net> <530CF8FF.8080600@users.sourceforge.net> <530DD06F.4090703@users.sourceforge.net> <5317A59D.4@users.sourceforge.net> <54D24CC3.9010006@users.sourceforge.net> In-Reply-To: <54D24CC3.9010006@users.sourceforge.net> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-Provags-ID: V03:K0:3UgealNC/bUH5IzGwzPAyj8XTjjGgjizcjL9iE8QhSEe2TDrzun oMKT8YECPXsL0v/4Ht9w9PMKe/EgulbXVsrLcXAzW5a72r/14ArCXzIIT9h6JigXFzBcEYX 0EwQaJ98YE7LgujiBVW7/kgtuoksVF5yxwv+cK5XDXzAbIso6mwSYn4npjcacoskdkBXy70 JxebxCLnT+iCb6WsIU8Fg== X-UI-Out-Filterresults: notjunk:1; Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Markus Elfring Date: Wed, 4 Feb 2015 17:28:41 +0100 The functions kfree() and release_firmware() were called in a few cases by the cw1200_load_firmware_cw1200() function during error handling even if the passed variables contained still a null pointer. Corresponding implementation details could be improved by adjustments for jump targets. Signed-off-by: Markus Elfring --- drivers/net/wireless/cw1200/fwio.c | 37 +++++++++++++++++++++++-------------- 1 file changed, 23 insertions(+), 14 deletions(-) diff --git a/drivers/net/wireless/cw1200/fwio.c b/drivers/net/wireless/cw1200/fwio.c index 581dfde..30e7646 100644 --- a/drivers/net/wireless/cw1200/fwio.c +++ b/drivers/net/wireless/cw1200/fwio.c @@ -66,25 +66,31 @@ static int cw1200_load_firmware_cw1200(struct cw1200_common *priv) do { \ ret = cw1200_apb_write_32(priv, CW1200_APB(reg), (val)); \ if (ret < 0) \ - goto error; \ + goto exit; \ + } while (0) +#define APB_WRITE2(reg, val) \ + do { \ + ret = cw1200_apb_write_32(priv, CW1200_APB(reg), (val)); \ + if (ret < 0) \ + goto free_buffer; \ } while (0) #define APB_READ(reg, val) \ do { \ ret = cw1200_apb_read_32(priv, CW1200_APB(reg), &(val)); \ if (ret < 0) \ - goto error; \ + goto free_buffer; \ } while (0) #define REG_WRITE(reg, val) \ do { \ ret = cw1200_reg_write_32(priv, (reg), (val)); \ if (ret < 0) \ - goto error; \ + goto exit; \ } while (0) #define REG_READ(reg, val) \ do { \ ret = cw1200_reg_read_32(priv, (reg), &(val)); \ if (ret < 0) \ - goto error; \ + goto exit; \ } while (0) switch (priv->hw_revision) { @@ -142,14 +148,14 @@ static int cw1200_load_firmware_cw1200(struct cw1200_common *priv) ret = request_firmware(&firmware, fw_path, priv->pdev); if (ret) { pr_err("Can't load firmware file %s.\n", fw_path); - goto error; + goto exit; } buf = kmalloc(DOWNLOAD_BLOCK_SIZE, GFP_KERNEL | GFP_DMA); if (!buf) { pr_err("Can't allocate firmware load buffer.\n"); ret = -ENOMEM; - goto error; + goto firmware_release; } /* Check if the bootloader is ready */ @@ -163,7 +169,7 @@ static int cw1200_load_firmware_cw1200(struct cw1200_common *priv) if (val32 != DOWNLOAD_I_AM_HERE) { pr_err("Bootloader is not ready.\n"); ret = -ETIMEDOUT; - goto error; + goto free_buffer; } /* Calculcate number of download blocks */ @@ -171,7 +177,7 @@ static int cw1200_load_firmware_cw1200(struct cw1200_common *priv) /* Updating the length in Download Ctrl Area */ val32 = firmware->size; /* Explicit cast from size_t to u32 */ - APB_WRITE(DOWNLOAD_IMAGE_SIZE_REG, val32); + APB_WRITE2(DOWNLOAD_IMAGE_SIZE_REG, val32); /* Firmware downloading loop */ for (block = 0; block < num_blocks; block++) { @@ -183,7 +189,7 @@ static int cw1200_load_firmware_cw1200(struct cw1200_common *priv) if (val32 != DOWNLOAD_PENDING) { pr_err("Bootloader reported error %d.\n", val32); ret = -EIO; - goto error; + goto free_buffer; } /* loop until put - get <= 24K */ @@ -198,7 +204,7 @@ static int cw1200_load_firmware_cw1200(struct cw1200_common *priv) if ((put - get) > (DOWNLOAD_FIFO_SIZE - DOWNLOAD_BLOCK_SIZE)) { pr_err("Timeout waiting for FIFO.\n"); ret = -ETIMEDOUT; - goto error; + goto free_buffer; } /* calculate the block size */ @@ -220,12 +226,12 @@ static int cw1200_load_firmware_cw1200(struct cw1200_common *priv) if (ret < 0) { pr_err("Can't write firmware block @ %d!\n", put & (DOWNLOAD_FIFO_SIZE - 1)); - goto error; + goto free_buffer; } /* update the put register */ put += block_size; - APB_WRITE(DOWNLOAD_PUT_REG, put); + APB_WRITE2(DOWNLOAD_PUT_REG, put); } /* End of firmware download loop */ /* Wait for the download completion */ @@ -238,18 +244,21 @@ static int cw1200_load_firmware_cw1200(struct cw1200_common *priv) if (val32 != DOWNLOAD_SUCCESS) { pr_err("Wait for download completion failed: 0x%.8X\n", val32); ret = -ETIMEDOUT; - goto error; + goto free_buffer; } else { pr_info("Firmware download completed.\n"); ret = 0; } -error: +free_buffer: kfree(buf); +firmware_release: release_firmware(firmware); +exit: return ret; #undef APB_WRITE +#undef APB_WRITE2 #undef APB_READ #undef REG_WRITE #undef REG_READ -- 2.2.2