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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 <[email protected]>
Cc: Ping-Ke Shih <[email protected]>
Signed-off-by: Kalle Valo <[email protected]>
This commit is contained in:
Larry Finger authored and Kalle Valo committed 2017-01-20 12:06:09 +02:00
1 parent 89d32c9071
commit 69d8597e9f
1 file changed
+2 -2
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drivers/net/wireless/realtek/rtlwifi/rtl8192cu/trx.c
+2 -2
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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);
}