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59 lines
1.7 KiB
Diff
59 lines
1.7 KiB
Diff
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From 7b95ade85ac18eec63e81ac58a482b3e88361ffd Mon Sep 17 00:00:00 2001
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From: Yi Yang <yiyang13@huawei.com>
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Date: Fri, 2 Dec 2022 09:21:26 +0800
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Subject: [PATCH 13/29] usb: fotg210-udc: fix potential memory leak in
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fotg210_udc_probe()
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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In fotg210_udc_probe(), if devm_clk_get() or clk_prepare_enable()
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fails, 'fotg210' will not be freed, which will lead to a memory leak.
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Fix it by moving kfree() to a proper location.
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In addition，we can use "return -ENOMEM" instead of "goto err"
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to simplify the code.
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Fixes: 718a38d092ec ("fotg210-udc: Handle PCLK")
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Reviewed-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
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Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
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Signed-off-by: Yi Yang <yiyang13@huawei.com>
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Link: https://lore.kernel.org/r/20221202012126.246953-1-yiyang13@huawei.com
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Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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---
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--- a/drivers/usb/fotg210/fotg210-udc.c
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+++ b/drivers/usb/fotg210/fotg210-udc.c
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@@ -1176,12 +1176,10 @@ int fotg210_udc_probe(struct platform_de
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return -ENODEV;
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}
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- ret = -ENOMEM;
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-
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/* initialize udc */
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fotg210 = kzalloc(sizeof(struct fotg210_udc), GFP_KERNEL);
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if (fotg210 == NULL)
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- goto err;
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+ return -ENOMEM;
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fotg210->dev = dev;
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@@ -1191,7 +1189,7 @@ int fotg210_udc_probe(struct platform_de
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ret = clk_prepare_enable(fotg210->pclk);
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if (ret) {
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dev_err(dev, "failed to enable PCLK\n");
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- return ret;
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+ goto err;
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}
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} else if (PTR_ERR(fotg210->pclk) == -EPROBE_DEFER) {
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/*
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@@ -1317,8 +1315,7 @@ err_pclk:
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if (!IS_ERR(fotg210->pclk))
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clk_disable_unprepare(fotg210->pclk);
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- kfree(fotg210);
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-
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err:
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+ kfree(fotg210);
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return ret;
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}
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