[PATCH] USB: g_file_storage: Consolidate min()s
This patch simplifies the g_file_storage driver by consolidating a bunch of min() calculations at a single spot. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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@ -1312,7 +1312,7 @@ static int class_setup_req(struct fsg_dev *fsg,
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}
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VDBG(fsg, "get max LUN\n");
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*(u8 *) req->buf = fsg->nluns - 1;
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value = min(w_length, (u16) 1);
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value = 1;
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break;
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}
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}
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@ -1360,7 +1360,6 @@ static int standard_setup_req(struct fsg_dev *fsg,
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int value = -EOPNOTSUPP;
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u16 w_index = ctrl->wIndex;
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u16 w_value = ctrl->wValue;
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u16 w_length = ctrl->wLength;
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/* Usually this just stores reply data in the pre-allocated ep0 buffer,
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* but config change events will also reconfigure hardware. */
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@ -1374,7 +1373,7 @@ static int standard_setup_req(struct fsg_dev *fsg,
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case USB_DT_DEVICE:
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VDBG(fsg, "get device descriptor\n");
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value = min(w_length, (u16) sizeof device_desc);
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value = sizeof device_desc;
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memcpy(req->buf, &device_desc, value);
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break;
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#ifdef CONFIG_USB_GADGET_DUALSPEED
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@ -1382,7 +1381,7 @@ static int standard_setup_req(struct fsg_dev *fsg,
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VDBG(fsg, "get device qualifier\n");
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if (!fsg->gadget->is_dualspeed)
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break;
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value = min(w_length, (u16) sizeof dev_qualifier);
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value = sizeof dev_qualifier;
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memcpy(req->buf, &dev_qualifier, value);
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break;
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@ -1401,8 +1400,6 @@ static int standard_setup_req(struct fsg_dev *fsg,
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req->buf,
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w_value >> 8,
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w_value & 0xff);
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if (value >= 0)
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value = min(w_length, (u16) value);
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break;
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case USB_DT_STRING:
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@ -1411,8 +1408,6 @@ static int standard_setup_req(struct fsg_dev *fsg,
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/* wIndex == language code */
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value = usb_gadget_get_string(&stringtab,
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w_value & 0xff, req->buf);
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if (value >= 0)
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value = min(w_length, (u16) value);
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break;
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}
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break;
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@ -1438,7 +1433,7 @@ static int standard_setup_req(struct fsg_dev *fsg,
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break;
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VDBG(fsg, "get configuration\n");
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*(u8 *) req->buf = fsg->config;
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value = min(w_length, (u16) 1);
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value = 1;
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break;
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case USB_REQ_SET_INTERFACE:
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@ -1466,14 +1461,14 @@ static int standard_setup_req(struct fsg_dev *fsg,
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}
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VDBG(fsg, "get interface\n");
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*(u8 *) req->buf = 0;
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value = min(w_length, (u16) 1);
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value = 1;
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break;
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default:
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VDBG(fsg,
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"unknown control req %02x.%02x v%04x i%04x l%u\n",
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ctrl->bRequestType, ctrl->bRequest,
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w_value, w_index, w_length);
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w_value, w_index, ctrl->wLength);
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}
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return value;
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@ -1485,6 +1480,7 @@ static int fsg_setup(struct usb_gadget *gadget,
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{
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struct fsg_dev *fsg = get_gadget_data(gadget);
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int rc;
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int w_length = ctrl->wLength;
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++fsg->ep0_req_tag; // Record arrival of a new request
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fsg->ep0req->context = NULL;
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@ -1498,8 +1494,9 @@ static int fsg_setup(struct usb_gadget *gadget,
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/* Respond with data/status or defer until later? */
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if (rc >= 0 && rc != DELAYED_STATUS) {
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rc = min(rc, w_length);
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fsg->ep0req->length = rc;
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fsg->ep0req->zero = (rc < ctrl->wLength &&
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fsg->ep0req->zero = (rc < w_length &&
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(rc % gadget->ep0->maxpacket) == 0);
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fsg->ep0req_name = (ctrl->bRequestType & USB_DIR_IN ?
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"ep0-in" : "ep0-out");
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