iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ata: libahci: properly propagate return value of platform_get_irq()

Browse Source 
When platform_get_irq() fails, it returns an error code, which
libahci_platform and replaces it by -EINVAL. This commit fixes that by
propagating the error code. It fixes the situation where
platform_get_irq() returns -EPROBE_DEFER because the interrupt
controller is not available yet, and generally looks like the right
thing to do.

We pay attention to not show the "no irq" message when we are in an
EPROBE_DEFER situation, because the driver probing will be retried
later on, once the interrupt controller becomes available to provide
the interrupt.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Thomas Petazzoni 2017-05-16 14:06:12 +02:00 committed by Tejun Heo
parent 5dc63fdcc0
commit c034640a32
1 changed files with 3 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/ata/libahci_platform.c
View File

@ -514,8 +514,9 @@ int ahci_platform_init_host(struct platform_device *pdev,
irq = platform_get_irq(pdev, 0);
if (irq <= 0) {
if (irq != -EPROBE_DEFER)
dev_err(dev, "no irq\n");
return -EINVAL;
return irq;
}
hpriv->irq = irq;