linux-kernel - Re: [v2] rsi: Fix failure to load firmware after memory leak fix and fixthe leak

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Message-Id: <20150731062312.CF880140A4E@smtp.codeaurora.org>
Date:	Fri, 31 Jul 2015 06:23:12 +0000 (UTC)
From:	Kalle Valo <kvalo@...eaurora.org>
To:	Mike Looijmans <mike.looijmans@...ic.nl>
Cc:	linux-wireless@...r.kernel.org, khoroshilov@...ras.ru,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Mike Looijmans <mike.looijmans@...ic.nl>,
	stable@...r.kernel.org
Subject: Re: [v2] rsi: Fix failure to load firmware after memory leak fix and
 fixthe leak


> Fixes commit eae79b4f3e82 ("rsi: fix memory leak in rsi_load_ta_instructions()")
> which stopped the driver from functioning.
> 
> Firmware data has been allocated using vmalloc(), resulting in memory
> that cannot be used for DMA. Hence the firmware was first copied to a
> buffer allocated with kmalloc() in the original code. This patch reverts
> the commit and only calls "kfree()" to release the buffer after sending
> the data. This fixes the memory leak without breaking the driver.
> 
> Add a comment to the kmemdup() calls to explain why this is done, and abort
> if memory allocation fails.
> 
> Tested on a Topic Miami-Florida board which contains the rsi SDIO chip.
> 
> Also added the same kfree() call to the USB glue driver. This was not
> tested on actual hardware though, as I only have the SDIO version.
> 
> Fixes: eae79b4f3e82 ("rsi: fix memory leak in rsi_load_ta_instructions()")
> Signed-off-by: Mike Looijmans <mike.looijmans@...ic.nl>
> Cc: stable@...r.kernel.org

Thanks, applied to wireless-drivers.git.

Kalle Valo
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