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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: Helmut Klein <hgkr.klein@gmail.com>
Tested-by: Helmut Klein <hgkr.klein@gmail.com>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
hifive-unleashed-5.1
Heiner Kallweit 2017-04-05 20:33:26 +02:00 committed by Kalle Valo
parent ecd7eb7c2b
commit 6e84ab604b
1 changed files with 4 additions and 0 deletions
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4
drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
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@ -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,