From d453ba81cd2981d0040dad0def161f91f209ddf9 Mon Sep 17 00:00:00 2001 From: Fariya Fatima Date: Wed, 2 Apr 2014 09:29:55 +0530 Subject: [PATCH] rsi: Fixed issue relating to doing dma on stack error. Signed-off-by: Fariya Fatima Signed-off-by: John W. Linville --- drivers/net/wireless/rsi/rsi_91x_usb.c | 26 +++++++++++++++++++------- 1 file changed, 19 insertions(+), 7 deletions(-) diff --git a/drivers/net/wireless/rsi/rsi_91x_usb.c b/drivers/net/wireless/rsi/rsi_91x_usb.c index bb1bf96670eb..4c46e5631e2f 100644 --- a/drivers/net/wireless/rsi/rsi_91x_usb.c +++ b/drivers/net/wireless/rsi/rsi_91x_usb.c @@ -154,24 +154,30 @@ static int rsi_usb_reg_read(struct usb_device *usbdev, u16 *value, u16 len) { - u8 temp_buf[4]; - int status = 0; + u8 *buf; + int status = -ENOMEM; + + buf = kmalloc(0x04, GFP_KERNEL); + if (!buf) + return status; status = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), USB_VENDOR_REGISTER_READ, USB_TYPE_VENDOR, ((reg & 0xffff0000) >> 16), (reg & 0xffff), - (void *)temp_buf, + (void *)buf, len, HZ * 5); - *value = (temp_buf[0] | (temp_buf[1] << 8)); + *value = (buf[0] | (buf[1] << 8)); if (status < 0) { rsi_dbg(ERR_ZONE, "%s: Reg read failed with error code :%d\n", __func__, status); } + kfree(buf); + return status; } @@ -190,8 +196,12 @@ static int rsi_usb_reg_write(struct usb_device *usbdev, u16 value, u16 len) { - u8 usb_reg_buf[4]; - int status = 0; + u8 *usb_reg_buf; + int status = -ENOMEM; + + usb_reg_buf = kmalloc(0x04, GFP_KERNEL); + if (!usb_reg_buf) + return status; usb_reg_buf[0] = (value & 0x00ff); usb_reg_buf[1] = (value & 0xff00) >> 8; @@ -212,6 +222,8 @@ static int rsi_usb_reg_write(struct usb_device *usbdev, "%s: Reg write failed with error code :%d\n", __func__, status); } + kfree(usb_reg_buf); + return status; } @@ -286,7 +298,7 @@ int rsi_usb_write_register_multiple(struct rsi_hw *adapter, return -ENOMEM; while (count) { - transfer = min_t(int, count, 4096); + transfer = (u8)(min_t(u32, count, 4096)); memcpy(buf, data, transfer); status = usb_control_msg(dev->usbdev, usb_sndctrlpipe(dev->usbdev, 0), -- 2.39.5