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rtw88: pci: reset H2C queue indexes in a single write

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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: Yan-Hsuan Chuang <yhchuang@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Yan-Hsuan Chuang 2019-10-02 10:31:18 +08:00 committed by Kalle Valo
parent 3c51960585
commit 6f0b0d28fd
1 changed files with 3 additions and 3 deletions
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6
drivers/net/wireless/realtek/rtw88/pci.c
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@ -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)