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SubjectRe: [PATCH] mfd: db8500-prcmu: check return of devm_ioremap for error
On Mon, 03 Nov 2014, Lee Jones wrote:

> On Thu, 30 Oct 2014, Pramod Gurav wrote:
>
> > Error check around return value of devm_ioremap is missing. Add the same
> > to avoid NULL pointer dereference.
> >
> > Cc: Linus Walleij <linus.walleij@linaro.org>
> > Cc: Samuel Ortiz <sameo@linux.intel.com>
> > Cc: Lee Jones <lee.jones@linaro.org>
> > Signed-off-by: Pramod Gurav <pramod.gurav@smartplayin.com>
> > ---
> > drivers/mfd/db8500-prcmu.c | 5 +++++
> > 1 file changed, 5 insertions(+)
> >
> > diff --git a/drivers/mfd/db8500-prcmu.c b/drivers/mfd/db8500-prcmu.c
> > index 193cf16..89ae8bf 100644
> > --- a/drivers/mfd/db8500-prcmu.c
> > +++ b/drivers/mfd/db8500-prcmu.c
> > @@ -3167,6 +3167,11 @@ static int db8500_prcmu_probe(struct platform_device *pdev)
> > }
> > tcdm_base = devm_ioremap(&pdev->dev, res->start,
> > resource_size(res));
> > + if (!tcdm_base) {
> > + dev_err(&pdev->dev,
> > + "failed to ioremap prcmu-tcdm register memory\n");
> > + return -ENOENT;
>
> No such file or directory? I think not.
>
> Changed to -ENOMEM and applied with Linus' Ack.

Slight change of plan, as it looks like all of the return paths were
bogus. Patch sent instead.

> > + }
> >
> > /* Clean up the mailbox interrupts after pre-kernel code. */
> > writel(ALL_MBOX_BITS, PRCM_ARM_IT1_CLR);
>

--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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