diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2014-07-26 00:01:26 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-08-02 02:59:47 +0400 |
| commit | cc4deafc86f75f4e716b37fb4ea3572eb1e49e50 (patch) | |
| tree | 7d7ff75022e6b98bf60d930a2403b9a12443b8b6 /drivers/usb | |
| parent | a0ee619f3ce8d8478c0cdd944b6cb24453ab6297 (diff) | |
| download | linux-cc4deafc86f75f4e716b37fb4ea3572eb1e49e50.tar.xz | |
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.h | 28 |
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; } |