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Commit 6e84ab60 authored by Heiner Kallweit's avatar Heiner Kallweit Committed by Kalle Valo
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brcmfmac: properly align buffers on certain platforms with 64 bit DMA 



Systems with 64 bit DMA at least partially require buffers to be used
for DMA to be 8-byte-aligned. One example is Amlogic Meson GX.
Switching the MMC/SDIO driver for this platform to SG DMA mode
resulted in problems due to unaligned buffers.

Fortunately the brcmfmac driver has a global define for the alignment.
Changing it to 8 fixed the issues with Meson GX.

Suggested-by: default avatarHelmut Klein <hgkr.klein@gmail.com>
Tested-by: default avatarHelmut Klein <hgkr.klein@gmail.com>
Signed-off-by: default avatarHeiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: default avatarKalle Valo <kvalo@codeaurora.org>
parent ecd7eb7c

drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c

+4 −0
Original line number Diff line number Diff line
@@ -540,7 +540,11 @@ static int qcount[NUMPRIO]; 
/* Limit on rounding up frames */

static const uint max_roundup = 512;



#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT

#define ALIGNMENT  8

#else

#define ALIGNMENT  4

#endif



enum brcmf_sdio_frmtype {

	BRCMF_SDIO_FT_NORMAL,