Re: [PATCH V3] Save command pool address of Scsi_Host

From: Juergen Gross
Date: Mon Aug 04 2014 - 07:17:25 EST


On 08/04/2014 01:08 PM, Christoph Hellwig wrote:
On Mon, Aug 04, 2014 at 06:26:09AM +0200, jgross@xxxxxxxx wrote:
From: Juergen Gross <jgross@xxxxxxxx>

If a scsi host driver specifies .cmd_len in it's scsi_host_template, a driver's
private command pool is needed. scsi_find_host_cmd_pool() will locate it, but
scsi_alloc_host_cmd_pool() isn't saving the pool address in the host template.

This will result in an access error when the host is removed.

Avoid the problem by saving the address of a new allocated command pool where
it is expected and delete it again when the pool is destroyed.

I don't really like the double pointer passing - just NULLing out the
pointer in the caller where needed seems cleaner.

I wanted to avoid to spread this, but I don't mind doing it. V4 is
coming...


Juergen

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/