Re: [PATCH 1/2 v5.4.y] mmc: mmci: stm32: use a buffer for unaligned DMA requests

[Greg KH <greg@kroah.com>]

On Tue, Apr 08, 2025 at 05:57:20PM +0530, Hardik Gohil wrote:
> From: Yann Gautier <yann.gautier@foss.st.com>
> 
> [ Upstream commit 970dc9c11a17994ab878016b536612ab00d1441d ]
> 
> In SDIO mode, the sg list for requests can be unaligned with what the
> STM32 SDMMC internal DMA can support. In that case, instead of failing,
> use a temporary bounce buffer to copy from/to the sg list.
> This buffer is limited to 1MB. But for that we need to also limit
> max_req_size to 1MB. It has not shown any throughput penalties for
> SD-cards or eMMC.
> 
> Signed-off-by: Yann Gautier <yann.gautier@foss.st.com>
> Link: https://lore.kernel.org/r/20220328145114.334577-1-yann.gautier@foss.st.com
> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
> Stable-dep-of: 6b1ba3f9040b ("mmc: mmci: stm32: fix DMA API overlapping mappings warning")
> Signed-off-by: Sasha Levin <sashal@kernel.org>
> Tested-by: Hardik A Gohil <hgohil@mvista.com>
> ---
> This fix was not backported to v5.4
> 
> Patch 1 and Patch 2 there were only line change.
> 
> Tested build successfully
> 
> dependend patch for this 2 patches
> https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.10.235&id=bdbf9faf5f2e6bb0c0243350428c908ac85c16b2

Then please send the full patch series, not just "prep" patches.

I'm dropping both of these from my review queue now, thanks.

greg k-h