Messages in this thread | | | Date | Thu, 4 Feb 2016 12:11:37 +0100 | Subject | Re: [PATCH] mmc: pxamci: fix the device-tree probe deferral path | From | Ulf Hansson <> |
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On 3 February 2016 at 23:19, Robert Jarzmik <robert.jarzmik@free.fr> wrote: > When the gpio driver is probed after the mmc one, the read/write gpio > and card detection one return -EPROBE_DEFER. Unfortunately, the memory > region remains requested, and upon the next probe, the probe will fail > anyway with -EBUSY. > > Fix this by releasing the memory resource upon probe failure. > > Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> > --- > drivers/mmc/host/pxamci.c | 3 +-- > 1 file changed, 1 insertion(+), 2 deletions(-) > > diff --git a/drivers/mmc/host/pxamci.c b/drivers/mmc/host/pxamci.c > index 28a057fae0a1..405ec339a1b8 100644 > --- a/drivers/mmc/host/pxamci.c > +++ b/drivers/mmc/host/pxamci.c > @@ -657,7 +657,7 @@ static int pxamci_probe(struct platform_device *pdev) > if (!r || irq < 0) > return -ENXIO; > > - r = request_mem_region(r->start, SZ_4K, DRIVER_NAME); > + r = devm_request_mem_region(&pdev->dev, r->start, SZ_4K, DRIVER_NAME);
I suggest you replace also the ioremap call, thus using devm_ioremap_resource() is convenient.
> if (!r) > return -EBUSY; > > @@ -840,7 +840,6 @@ out: > } > if (mmc) > mmc_free_host(mmc); > - release_resource(r);
This looks wrong.
> return ret; > } > > -- > 2.1.4 >
Perhaps it's just easier to convert the probe function to use all devm_* functions, as for example irqs isn't freed either.
In that way, you will solve all problems of also leaking memory in one go.
Kind regards Uffe
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