staging: most: usb: use EINVAL error code

This patch replaces the error code EIO with EINVAL, when there is no IO
happening.

Signed-off-by: Christian Gromm <christian.gromm@microchip.com>
Link: https://lore.kernel.org/r/1588672829-28883-3-git-send-email-christian.gromm@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/most/usb/usb.c b/drivers/staging/most/usb/usb.c
index 9527e31..1087ad9 100644 (file)
--- a/drivers/staging/most/usb/usb.c
+++ b/drivers/staging/most/usb/usb.c
@@ -274,13 +274,13 @@ static int hdm_add_padding(struct most_dev *mdev, int channel, struct mbo *mbo)
        unsigned int j, num_frames;
 
        if (!frame_size)
-               return -EIO;
+               return -EINVAL;
        num_frames = mbo->buffer_length / frame_size;
 
        if (num_frames < 1) {
                dev_err(&mdev->usb_device->dev,
                        "Missed minimal transfer unit.\n");
-               return -EIO;
+               return -EINVAL;
        }
 
        for (j = num_frames - 1; j > 0; j--)
@@ -308,7 +308,7 @@ static int hdm_remove_padding(struct most_dev *mdev, int channel,
        unsigned int j, num_frames;
 
        if (!frame_size)
-               return -EIO;
+               return -EINVAL;
        num_frames = mbo->processed_length / USB_MTU;
 
        for (j = 1; j < num_frames; j++)
@@ -556,7 +556,7 @@ static int hdm_enqueue(struct most_interface *iface, int channel,
        void *virt_address;
 
        if (unlikely(!mbo))
-               return -EIO;
+               return -EINVAL;
        if (unlikely(iface->num_channels <= channel || channel < 0))
                return -ECHRNG;
 
@@ -577,7 +577,7 @@ static int hdm_enqueue(struct most_interface *iface, int channel,
 
        if ((conf->direction & MOST_CH_TX) && mdev->padding_active[channel] &&
            hdm_add_padding(mdev, channel, mbo)) {
-               retval = -EIO;
+               retval = -EINVAL;
                goto err_free_urb;
        }