Re: [PATCH] sata_sil24: Use memory barriers before issuing commands

From: Tejun Heo
Date: Thu Jun 10 2010 - 11:24:59 EST

On 06/10/2010 04:57 PM, Catalin Marinas wrote:
> The data in the cmd_block buffers may reach the main memory after the
> writel() to the device ports. This patch introduces two calls to wmb()
> to ensure the relative ordering.
> Signed-off-by: Catalin Marinas <catalin.marinas@xxxxxxx>
> Tested-by: Colin Tuckley <colin.tuckley@xxxxxxx>
> Cc: Tejun Heo <tj@xxxxxxxxxx>

Can you please add comments explaining why they're needed?


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