From 70ebadc8e30efef3bf21ba94b3571537de8bcf4e Mon Sep 17 00:00:00 2001 From: Julia Lawall Date: Sun, 13 Sep 2009 21:15:18 +0200 Subject: [PATCH] MIPS: TXx9: Fix error handling. Error handling code following a kzalloc should free the allocated data. Error handling code following an ioremap should iounmap the allocated data. The semantic match that finds the first problem is as follows: (http://www.emn.fr/x-info/coccinelle/) // @r exists@ local idexpression x; statement S; expression E; identifier f,f1,l; position p1,p2; expression *ptr != NULL; @@ x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...); ... if (x == NULL) S <... when != x when != if (...) { <+...x...+> } ( x->f1 = E | (x->f1 == NULL || ...) | f(...,x->f1,...) ) ...> ( return \(0\|<+...x...+>\|ptr\); | return@p2 ...; ) @script:python@ p1 << r.p1; p2 << r.p2; @@ print "* file: %s kmalloc %s return %s" % (p1[0].file,p1[0].line,p2[0].line) // Signed-off-by: Julia Lawall Signed-off-by: Ralf Baechle --- arch/mips/txx9/generic/setup.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) diff --git a/arch/mips/txx9/generic/setup.c b/arch/mips/txx9/generic/setup.c index a205e2ba8e7b..c860810722c0 100644 --- a/arch/mips/txx9/generic/setup.c +++ b/arch/mips/txx9/generic/setup.c @@ -782,7 +782,7 @@ void __init txx9_iocled_init(unsigned long baseaddr, return; iocled->mmioaddr = ioremap(baseaddr, 1); if (!iocled->mmioaddr) - return; + goto out_free; iocled->chip.get = txx9_iocled_get; iocled->chip.set = txx9_iocled_set; iocled->chip.direction_input = txx9_iocled_dir_in; @@ -791,13 +791,13 @@ void __init txx9_iocled_init(unsigned long baseaddr, iocled->chip.base = basenum; iocled->chip.ngpio = num; if (gpiochip_add(&iocled->chip)) - return; + goto out_unmap; if (basenum < 0) basenum = iocled->chip.base; pdev = platform_device_alloc("leds-gpio", basenum); if (!pdev) - return; + goto out_gpio; iocled->pdata.num_leds = num; iocled->pdata.leds = iocled->leds; for (i = 0; i < num; i++) { @@ -812,7 +812,16 @@ void __init txx9_iocled_init(unsigned long baseaddr, } pdev->dev.platform_data = &iocled->pdata; if (platform_device_add(pdev)) - platform_device_put(pdev); + goto out_pdev; + return; +out_pdev: + platform_device_put(pdev); +out_gpio: + gpio_remove(&iocled->chip); +out_unmap: + iounmap(iocled->mmioaddr); +out_free: + kfree(iocled); } #else /* CONFIG_LEDS_GPIO */ void __init txx9_iocled_init(unsigned long baseaddr, -- 2.20.1