diff options
| author | Fariya Fatima <fariyaf@gmail.com> | 2014-04-02 07:59:55 +0400 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2014-04-09 21:55:54 +0400 |
| commit | d453ba81cd2981d0040dad0def161f91f209ddf9 (patch) | |
| tree | 1a7c16976169f5728b9169140118a9574c368b67 | |
| parent | 5156fd24e9aec406ae14f02fc1779e234553fbd3 (diff) | |
| download | linux-d453ba81cd2981d0040dad0def161f91f209ddf9.tar.xz | |
rsi: Fixed issue relating to doing dma on stack error.
Signed-off-by: Fariya Fatima <fariyaf@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
| -rw-r--r-- | drivers/net/wireless/rsi/rsi_91x_usb.c | 26 |
1 files 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), |