From 3475dd8a68a7c705bee88b143422ba02cb9a796b Mon Sep 17 00:00:00 2001 From: Julia Lawall Date: Sat, 1 Aug 2009 10:52:51 +0200 Subject: powerpc/qe: introduce missing kfree Error handling code following a kzalloc should free the allocated data. The semantic match that finds the 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 Acked-by: Timur Tabi Signed-off-by: Kumar Gala Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/sysdev/qe_lib/qe_ic.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'arch/powerpc/sysdev/qe_lib') diff --git a/arch/powerpc/sysdev/qe_lib/qe_ic.c b/arch/powerpc/sysdev/qe_lib/qe_ic.c index 074905c3ee5..3faa42e03a8 100644 --- a/arch/powerpc/sysdev/qe_lib/qe_ic.c +++ b/arch/powerpc/sysdev/qe_lib/qe_ic.c @@ -339,8 +339,10 @@ void __init qe_ic_init(struct device_node *node, unsigned int flags, qe_ic->irqhost = irq_alloc_host(node, IRQ_HOST_MAP_LINEAR, NR_QE_IC_INTS, &qe_ic_host_ops, 0); - if (qe_ic->irqhost == NULL) + if (qe_ic->irqhost == NULL) { + kfree(qe_ic); return; + } qe_ic->regs = ioremap(res.start, res.end - res.start + 1); @@ -352,6 +354,7 @@ void __init qe_ic_init(struct device_node *node, unsigned int flags, if (qe_ic->virq_low == NO_IRQ) { printk(KERN_ERR "Failed to map QE_IC low IRQ\n"); + kfree(qe_ic); return; } -- cgit v1.2.3 From 1dcd8ffc81e80a170625883f63f6a5db3cd0428d Mon Sep 17 00:00:00 2001 From: Michael Barkowski Date: Tue, 18 Aug 2009 17:20:44 -0400 Subject: powerpc/qe_lib: Set gpio data before changing the direction to output This avoids having a short glitch if the desired initial value is not the same as what was previously in the data register. Signed-off-by: Michael Barkowski Acked-by: Anton Vorontsov Signed-off-by: Kumar Gala --- arch/powerpc/sysdev/qe_lib/gpio.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'arch/powerpc/sysdev/qe_lib') diff --git a/arch/powerpc/sysdev/qe_lib/gpio.c b/arch/powerpc/sysdev/qe_lib/gpio.c index 3485288dce3..8e7a7767dd5 100644 --- a/arch/powerpc/sysdev/qe_lib/gpio.c +++ b/arch/powerpc/sysdev/qe_lib/gpio.c @@ -105,14 +105,14 @@ static int qe_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val) struct qe_gpio_chip *qe_gc = to_qe_gpio_chip(mm_gc); unsigned long flags; + qe_gpio_set(gc, gpio, val); + spin_lock_irqsave(&qe_gc->lock, flags); __par_io_config_pin(mm_gc->regs, gpio, QE_PIO_DIR_OUT, 0, 0, 0); spin_unlock_irqrestore(&qe_gc->lock, flags); - qe_gpio_set(gc, gpio, val); - return 0; } -- cgit v1.2.3