From 5a84e6f608598dd691c0024eab50fffb96aca43b Mon Sep 17 00:00:00 2001 From: Andrzej Pietrasiewicz Date: Tue, 3 Mar 2015 10:52:17 +0100 Subject: [PATCH] usb: gadget: printer: don't access file global pnp_string in function's code In order to factor out a reusable f_printer, the function's code should not use file global variables related to legacy printer gadget's implementation. Signed-off-by: Andrzej Pietrasiewicz Signed-off-by: Felipe Balbi --- drivers/usb/gadget/legacy/printer.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/drivers/usb/gadget/legacy/printer.c b/drivers/usb/gadget/legacy/printer.c index db5e2f0681c7..42c46da6f59f 100644 --- a/drivers/usb/gadget/legacy/printer.c +++ b/drivers/usb/gadget/legacy/printer.c @@ -86,6 +86,7 @@ struct printer_dev { u8 printer_cdev_open; wait_queue_head_t wait; unsigned q_len; + char *pnp_string; /* We don't own memory! */ struct usb_function function; }; @@ -994,10 +995,10 @@ static int printer_func_setup(struct usb_function *f, if ((wIndex>>8) != dev->interface) break; - value = (pnp_string[0]<<8)|pnp_string[1]; - memcpy(req->buf, pnp_string, value); + value = (dev->pnp_string[0] << 8) | dev->pnp_string[1]; + memcpy(req->buf, dev->pnp_string, value); DBG(dev, "1284 PNP String: %x %s\n", value, - &pnp_string[2]); + &dev->pnp_string[2]); break; case 1: /* Get Port Status */ @@ -1230,13 +1231,14 @@ static struct usb_configuration printer_cfg_driver = { }; static int f_printer_bind_config(struct usb_configuration *c, char *pnp_str, - unsigned q_len) + char *pnp_string, unsigned q_len) { struct printer_dev *dev; int status = -ENOMEM; size_t len; dev = &usb_printer_gadget; + dev->pnp_string = pnp_string; dev->function.name = shortname; dev->function.bind = printer_func_bind; @@ -1249,7 +1251,7 @@ static int f_printer_bind_config(struct usb_configuration *c, char *pnp_str, INIT_LIST_HEAD(&dev->rx_buffers); if (pnp_str) - strlcpy(&pnp_string[2], pnp_str, PNP_STRING_LEN - 2); + strlcpy(&dev->pnp_string[2], pnp_str, PNP_STRING_LEN - 2); len = strlen(pnp_string); pnp_string[0] = (len >> 8) & 0xFF; @@ -1292,7 +1294,7 @@ static int __init printer_do_config(struct usb_configuration *c) printer_cfg_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP; } - return f_printer_bind_config(c, iPNPstring, QLEN); + return f_printer_bind_config(c, iPNPstring, pnp_string, QLEN); } -- 2.20.1