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authorHans de Goede <hdegoede@redhat.com>2014-07-25 22:01:26 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-08-01 15:59:47 -0700
commitcc4deafc86f75f4e716b37fb4ea3572eb1e49e50 (patch)
tree7d7ff75022e6b98bf60d930a2403b9a12443b8b6 /drivers/usb
parenta0ee619f3ce8d8478c0cdd944b6cb24453ab6297 (diff)
uas: Only complain about missing sg if all other checks succeed
Don't complain about controllers without sg support if there are other reasons why uas cannot be used anyways. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/storage/uas-detect.h28
1 files changed, 10 insertions, 18 deletions
diff --git a/drivers/usb/storage/uas-detect.h b/drivers/usb/storage/uas-detect.h
index bb05b984d5f6..618b41791744 100644
--- a/drivers/usb/storage/uas-detect.h
+++ b/drivers/usb/storage/uas-detect.h
@@ -9,32 +9,15 @@ static int uas_is_interface(struct usb_host_interface *intf)
intf->desc.bInterfaceProtocol == USB_PR_UAS);
}
-static int uas_isnt_supported(struct usb_device *udev)
-{
- struct usb_hcd *hcd = bus_to_hcd(udev->bus);
-
- dev_warn(&udev->dev, "The driver for the USB controller %s does not "
- "support scatter-gather which is\n",
- hcd->driver->description);
- dev_warn(&udev->dev, "required by the UAS driver. Please try an"
- "alternative USB controller if you wish to use UAS.\n");
- return -ENODEV;
-}
-
static int uas_find_uas_alt_setting(struct usb_interface *intf)
{
int i;
- struct usb_device *udev = interface_to_usbdev(intf);
- int sg_supported = udev->bus->sg_tablesize != 0;
for (i = 0; i < intf->num_altsetting; i++) {
struct usb_host_interface *alt = &intf->altsetting[i];
- if (uas_is_interface(alt)) {
- if (!sg_supported)
- return uas_isnt_supported(udev);
+ if (uas_is_interface(alt))
return alt->desc.bAlternateSetting;
- }
}
return -ENODEV;
@@ -92,5 +75,14 @@ static int uas_use_uas_driver(struct usb_interface *intf,
if (r < 0)
return 0;
+ if (udev->bus->sg_tablesize == 0) {
+ dev_warn(&udev->dev,
+ "The driver for the USB controller %s does not support scatter-gather which is\n",
+ hcd->driver->description);
+ dev_warn(&udev->dev,
+ "required by the UAS driver. Please try an other USB controller if you wish to use UAS.\n");
+ return 0;
+ }
+
return 1;
}