[PATCH 03/11] ath10k_sdio: DMA bounce buffers for read write

Kalle Valo kvalo at qca.qualcomm.com
Fri Dec 22 08:08:40 PST 2017

silexcommon at gmail.com writes:

> From: Alagu Sankar <alagusankar at silex-india.com>
> Some SD host controllers still need bounce buffers for SDIO data
> transfers. While the transfers worked fine on x86 platforms,
> this is found to be required for i.MX6 based systems.
> Changes are similar to and derived from the ath6kl sdio driver.
> Signed-off-by: Alagu Sankar <alagusankar at silex-india.com>

Why is the bounce buffer needed exactly, what are the symptoms etc? To
me this sounds like an ugly workaround for a SDIO controller driver bug.

Kalle Valo

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