From: Brian Norris <computersforpeace@gmail.com>
To: Roger Quadros <rogerq@ti.com>
Cc: nm@ti.com, nsekhar@ti.com, linux-kernel@vger.kernel.org,
linux-mtd@lists.infradead.org,
ezequiel.garcia@free-electrons.com, dwmw2@infradead.org
Subject: Re: [PATCH] mtd: nand: Prevent possible kernel lockup in nand_command()
Date: Mon, 30 Mar 2015 17:45:53 -0700 [thread overview]
Message-ID: <20150331004553.GG32500@ld-irv-0074> (raw)
In-Reply-To: <1424705199-11337-1-git-send-email-rogerq@ti.com>
On Mon, Feb 23, 2015 at 05:26:39PM +0200, Roger Quadros wrote:
> If a NAND device is not really present or pin muxes are not correctly
> configured we can lock up the kernel waiting infinitely for NAND_STATUS
> to be ready.
>
> This can be easily reproduced on TI's DRA7-evm board by booting it
> without NAND support in u-boot and disabling NAND pin muxes in the kernel.
>
> Add timeout when waiting for NAND_CMD_RESET completion. As per ONFi v4.0
> tRST can be upto 250ms for EZ-NAND and 5ms for raw NAND.
>
> Signed-off-by: Roger Quadros <rogerq@ti.com>
> Tested-by: Nishanth Menon <nm@ti.com>
Pushed to l2-mtd.git. Thanks.
Brian
prev parent reply other threads:[~2015-03-31 0:46 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-23 15:26 [PATCH] mtd: nand: Prevent possible kernel lockup in nand_command() Roger Quadros
2015-03-24 12:31 ` Roger Quadros
2015-03-31 0:45 ` Brian Norris [this message]
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