Commit 6f0b0d28 authored by Yan-Hsuan Chuang's avatar Yan-Hsuan Chuang Committed by Kalle Valo
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rtw88: pci: reset H2C queue indexes in a single write 



If the driver doesn't reset the host's and device's indexes
in a single write, the indexes will become different in a
short period. And it will confuse the DMA engine, make it
start to process non-existed entries.

Better to Write-1-to-reset the indexes, for the DMA engine
to know that this is a reset of the H2C queue, not a kick
off.

Signed-off-by: default avatarYan-Hsuan Chuang <yhchuang@realtek.com>
Signed-off-by: default avatarKalle Valo <kvalo@codeaurora.org>
parent 3c519605

drivers/net/wireless/realtek/rtw88/pci.c

+3 −3
Original line number Diff line number Diff line
@@ -457,9 +457,9 @@ static void rtw_pci_reset_buf_desc(struct rtw_dev *rtwdev) 
	/* reset read/write point */

	rtw_write32(rtwdev, RTK_PCI_TXBD_RWPTR_CLR, 0xffffffff);



	/* rest H2C Queue index */

	rtw_write32_set(rtwdev, RTK_PCI_TXBD_H2CQ_CSR, BIT_CLR_H2CQ_HOST_IDX);

	rtw_write32_set(rtwdev, RTK_PCI_TXBD_H2CQ_CSR, BIT_CLR_H2CQ_HW_IDX);

	/* reset H2C Queue index in a single write */

	rtw_write32_set(rtwdev, RTK_PCI_TXBD_H2CQ_CSR,

			BIT_CLR_H2CQ_HOST_IDX | BIT_CLR_H2CQ_HW_IDX);

}



static void rtw_pci_reset_trx_ring(struct rtw_dev *rtwdev)