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uio_pdrv_genirq: Allow use with non-page-aligned memory resources

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Similar to the changes made in 270579d95f ("uio_mf624: Align memory
regions to page size and set correct offsets"), this will allow
uio_pdrv_genirq devices to expose memory regions that is not page-aligned,
requiring the users to respect the offset sysfs attribute (as implemented
in libuio).

Signed-off-by: Esben Haabendal <esben@geanix.com>
Link: https://lore.kernel.org/r/20200701145659.3978-4-esben@geanix.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Esben Haabendal 2020-07-01 16:56:59 +02:00 committed by Greg Kroah-Hartman
parent 52f944ee5d
commit 7aca462b13
1 changed files with 4 additions and 2 deletions
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6
drivers/uio/uio_pdrv_genirq.c
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@ -187,8 +187,10 @@ static int uio_pdrv_genirq_probe(struct platform_device *pdev)
}
uiomem->memtype = UIO_MEM_PHYS;
uiomem->addr = r->start;
uiomem->size = resource_size(r);
uiomem->addr = r->start & PAGE_MASK;
uiomem->offs = r->start & ~PAGE_MASK;
uiomem->size = (uiomem->offs + resource_size(r)
+ PAGE_SIZE - 1) & PAGE_MASK;
uiomem->name = r->name;
++uiomem;
}