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rtlwifi: rtl8192cu: Calculate descriptor checksum correctly for BE

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This driver requires a checksum for the descriptors so that the wifi
chip is assured that the USB transmission was correct. These entries
are little-endian, but the driver was always using cpu order in the
calculation. As a result, the driver failed on BE hardware.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Larry Finger 2017-01-19 14:28:07 -06:00 committed by Kalle Valo
parent 89d32c9071
commit 69d8597e9f
1 changed files with 2 additions and 2 deletions
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4
drivers/net/wireless/realtek/rtlwifi/rtl8192cu/trx.c
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@ -477,14 +477,14 @@ static void _rtl_fill_usb_tx_desc(u8 *txdesc)
*/
static void _rtl_tx_desc_checksum(u8 *txdesc)
{
u16 *ptr = (u16 *)txdesc;
__le16 *ptr = (__le16 *)txdesc;
u16 checksum = 0;
u32 index;
/* Clear first */
SET_TX_DESC_TX_DESC_CHECKSUM(txdesc, 0);
for (index = 0; index < 16; index++)
checksum = checksum ^ (*(ptr + index));
checksum = checksum ^ le16_to_cpu(*(ptr + index));
SET_TX_DESC_TX_DESC_CHECKSUM(txdesc, checksum);
}