On Fri, 14 Dec 2012, fangxiaozhi 00110321 wrote:
> From: fangxiaozhi <huananhu@xxxxxxxxxx>
>
> 1. Add a new macro define for USB storage match rule.
> 2. Optimize the match rules with new macro for Huawei USB storage devices,
> to avoid to load USB storage driver for the modem interface
> with Huawei devices.
> 3. Add to support new switch command for new Huawei USB dongles.
>
> Signed-off-by: fangxiaozhi <huananhu@xxxxxxxxxx>
> --------------------------------------------------------------------
>
> diff -uprN linux-3.7_bak/drivers/usb/storage/initializers.c linux-3.7/drivers/usb/storage/initializers.c
> --- linux-3.7_bak/drivers/usb/storage/initializers.c 2012-12-11 09:56:11.000000000 +0800
> +++ linux-3.7/drivers/usb/storage/initializers.c 2012-12-13 20:53:40.000000000 +0800
> @@ -104,3 +104,55 @@ int usb_stor_huawei_e220_init(struct us_
> US_DEBUGP("Huawei mode set result is %d\n", result);
> return 0;
> }
> +
> +/* Find the supported Huawei USB dongles */
> +static int usb_stor_huawei_dongles_pid(struct us_data *us)
> +{
> + struct usb_interface_descriptor *idesc;
> + int idProduct;
There should be a blank line here.
> + idesc = &us->pusb_intf->cur_altsetting->desc;
> + idProduct = us->pusb_dev->descriptor.idProduct;
> + if (idesc && idesc->bInterfaceNumber == 0) {
> + if ((idProduct == 0x1001)
> + || (idProduct == 0x1003)
> + || (idProduct == 0x1004)
> + || (idProduct >= 0x1401 && idProduct < 0x1501)
> + || (idProduct > 0x1504 && idProduct <= 0x1600)
> + || (idProduct >= 0x1c02 && idProduct <= 0x2202)) {
> + return 1;
> + }
> + }
> + return 0;
> +}
> +
> +static int usb_stor_huawei_scsi_init(struct us_data *us)
> +{
> + int result = 0;
> + int act_len = 0;
> + char rewind_cmd[] = {0x11, 0x06, 0x20, 0x00, 0x00, 0x01, 0x01, 0x00,
> + 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
> + struct bulk_cb_wrap bcbw = {0};
This is wrong. You cannot use a buffer that is allocated on the
stack. You should use us->iobuf for this purpose, like
usb_stor_Bulk_transport() does.
There should be a blank line here.
> + bcbw.Signature = cpu_to_le32(US_BULK_CB_SIGN);
> + bcbw.Tag = 0;
> + bcbw.DataTransferLength = cpu_to_le32(0);
What is the purpose of rearranging the byte order of a 0 value? All
the bytes are equal to 0; the order doesn't matter.
> + bcbw.Flags = bcbw.Lun = 0;
> + bcbw.Length = sizeof(rewind_cmd);
> + memcpy(bcbw.CDB, rewind_cmd, sizeof(rewind_cmd));
> +
> + result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, &bcbw,
> + US_BULK_CS_WRAP_LEN, &act_len);
> + US_DEBUGP("transfer actual length=%d, result=%d\n", act_len, result);
> + return result;
> +}
Alan Stern
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