Re: [PATCH 2/3] mmc: sdhci-acpi: Check device status before calling fix_up_power()

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



HI,

On 25-02-17 18:23, Hans de Goede wrote:
Calling acpi_device_fix_up_power() on a device which is not present
is not a good idea.

While at it also call acpi_bus_get_status() on the children before
the status check to make sure that child->status contains valid data.

This paragraph of the commit msg should be removed, I dropped
that part of the patch since acpi_init_device_object() already sets
status and all acpi_device's get that called upon creation.

Regards,

Hans




Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
 drivers/mmc/host/sdhci-acpi.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c
index 96465ff..873beae 100644
--- a/drivers/mmc/host/sdhci-acpi.c
+++ b/drivers/mmc/host/sdhci-acpi.c
@@ -394,15 +394,15 @@ static int sdhci_acpi_probe(struct platform_device *pdev)
 	if (acpi_bus_get_device(handle, &device))
 		return -ENODEV;

+	if (acpi_bus_get_status(device) || !device->status.present)
+		return -ENODEV;
+
 	/* Power on the SDHCI controller and its children */
 	acpi_device_fix_up_power(device);
 	list_for_each_entry(child, &device->children, node)
 		if (child->status.present && child->status.enabled)
 			acpi_device_fix_up_power(child);

-	if (acpi_bus_get_status(device) || !device->status.present)
-		return -ENODEV;
-
 	if (sdhci_acpi_byt_defer(dev))
 		return -EPROBE_DEFER;


--
To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Linux USB Devel]     [Linux Media]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux