[PATCH 3/5] mmc: sdhci: fix align_buffer memory leak on re-initialization

[Kathpalia, Tanmay]

On 7/12/2026 6:37 PM, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan at nxp.com>
>
> sdhci_init() allocates a 512KB aligned bounce buffer for controllers
> with SDHCI_QUIRK_32BIT_DMA_ADDR. In the non-DM code path, sdhci_init()
> is registered as ops->init and called on every mmc_init(). Each call
> allocates a new buffer without checking or freeing the previous one,
> leaking 512KB per re-initialization.
>
> Fix by guarding the allocation with !host->align_buffer so it only
> allocates on the first call.
>
> Signed-off-by: Peng Fan <peng.fan at nxp.com>

Signed-off-by: Tanmay Kathpalia <tanmay.kathpalia at altera.com>

>