Messages in this thread | | | From | Robert Jarzmik <> | Subject | Re: [PATCH] mmc: pxamci: fix the device-tree probe deferral path | Date | Thu, 04 Feb 2016 21:28:59 +0100 |
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Ulf Hansson <ulf.hansson@linaro.org> writes:
> 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. Yes, of course, for v2.
>> @@ -840,7 +840,6 @@ out: >> } >> if (mmc) >> mmc_free_host(mmc); >> - release_resource(r); > > This looks wrong. Hum. Why so ?
> Perhaps it's just easier to convert the probe function to use all > devm_* functions, as for example irqs isn't freed either. You're very right. Actually the first patch I had was with devm_irq_request(), and then I reverted that chunk, thinking I was overdoing it, and that this didn't belong to this commit. Silly me, hein ?
> In that way, you will solve all problems of also leaking memory in one go. Sure.
Cheers.
-- Robert
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