From 5b9030cee1bedba934adb5c7ae708e510dddd0f0 Mon Sep 17 00:00:00 2001 From: Rakesh Pillai Date: Mon, 3 Sep 2018 22:07:02 +0530 Subject: ath10k: Set DMA address mask to 35 bit for WCN3990 WCN3990 is a 37-bit target but can address memory range only upto 35 bits. The 36th bit is used to control the smmu/iommu translation and the 37th bit is used by the internal bus masters to access the wifi subsystem internal SRAM. With the DMA mask set to 37i-bit, the host driver can get 37-bit dma address, which leads to incorrect address access in the target. Hence the host driver can used addresses upto 35-bit for WCN3990. Fix the dma mask for wcn3990 to 35-bit, instead of 37-bit. Tested HW: WCN3990 Tested FW: WLAN.HL.2.0-01188-QCAHLSWMTPLZ-1 Tested-by: Bjorn Andersson Signed-off-by: Rakesh Pillai Signed-off-by: Kalle Valo --- drivers/net/wireless/ath/ath10k/snoc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/net/wireless/ath/ath10k/snoc.c') diff --git a/drivers/net/wireless/ath/ath10k/snoc.c b/drivers/net/wireless/ath/ath10k/snoc.c index 54efe6be8f1d..0032bc5dd934 100644 --- a/drivers/net/wireless/ath/ath10k/snoc.c +++ b/drivers/net/wireless/ath/ath10k/snoc.c @@ -66,7 +66,7 @@ static void ath10k_snoc_pktlog_rx_cb(struct ath10k_ce_pipe *ce_state); static const struct ath10k_snoc_drv_priv drv_priv = { .hw_rev = ATH10K_HW_WCN3990, - .dma_mask = DMA_BIT_MASK(37), + .dma_mask = DMA_BIT_MASK(35), .msa_size = 0x100000, }; -- cgit