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Commit eb823253 authored by Vasanthakumar Thiagarajan's avatar Vasanthakumar Thiagarajan Committed by John W. Linville
Browse files

ath9k_hw: Compute pointer checksum over the link descriptor 



Signed-off-by: default avatarVasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: default avatarFelix Fietkau <nbd@openwrt.org>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 5088c2f1

drivers/net/wireless/ath/ath9k/ar9003_mac.c

+21 −15
Original line number Diff line number Diff line
@@ -21,14 +21,33 @@ static void ar9003_hw_rx_enable(struct ath_hw *hw) 
	REG_WRITE(hw, AR_CR, 0);

}



static u16 ar9003_calc_ptr_chksum(struct ar9003_txc *ads)

{

	int checksum;



	checksum = ads->info + ads->link

		+ ads->data0 + ads->ctl3

		+ ads->data1 + ads->ctl5

		+ ads->data2 + ads->ctl7

		+ ads->data3 + ads->ctl9;



	return ((checksum & 0xffff) + (checksum >> 16)) & AR_TxPtrChkSum;

}



static void ar9003_hw_set_desc_link(void *ds, u32 ds_link)

{

	((struct ar9003_txc *) ds)->link = ds_link;

	struct ar9003_txc *ads = ds;



	ads->link = ds_link;

	ads->ctl10 &= ~AR_TxPtrChkSum;

	ads->ctl10 |= ar9003_calc_ptr_chksum(ads);

}



static void ar9003_hw_get_desc_link(void *ds, u32 **ds_link)

{

	*ds_link = &((struct ar9003_txc *) ds)->link;

	struct ar9003_txc *ads = ds;



	*ds_link = &ads->link;

}



static bool ar9003_hw_get_isr(struct ath_hw *ah, enum ath9k_int *masked)
@@ -168,19 +187,6 @@ static bool ar9003_hw_get_isr(struct ath_hw *ah, enum ath9k_int *masked) 
	return true;

}



static u16 ar9003_calc_ptr_chksum(struct ar9003_txc *ads)

{

	int checksum;



	checksum = ads->info + ads->link

		+ ads->data0 + ads->ctl3

		+ ads->data1 + ads->ctl5

		+ ads->data2 + ads->ctl7

		+ ads->data3 + ads->ctl9;



	return ((checksum & 0xffff) + (checksum >> 16)) & AR_TxPtrChkSum;

}



static void ar9003_hw_fill_txdesc(struct ath_hw *ah, void *ds, u32 seglen,

				  bool is_firstseg, bool is_lastseg,

				  const void *ds0, dma_addr_t buf_addr,