From: Mark Brown <broonie@kernel.org>
To: Stephen Boyd <sboyd@codeaurora.org>
Cc: Samuel Ortiz <sameo@linux.intel.com>,
Lee Jones <lee.jones@linaro.org>,
Srinivas Ramana <sramana@codeaurora.org>,
linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 3/8] regmap: Add support for using regmap over ssbi
Date: Tue, 10 Dec 2013 23:50:00 +0000 [thread overview]
Message-ID: <20131210235000.GK11468@sirena.org.uk> (raw)
In-Reply-To: <1386718523-2587-4-git-send-email-sboyd@codeaurora.org>
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On Tue, Dec 10, 2013 at 03:35:18PM -0800, Stephen Boyd wrote:
> + while (val_size) {
> + ret = ssbi_read(context, *(u16 *)reg, val, 1);
> + if (ret)
> + return ret;
> + reg += sizeof(u16);
> + val += sizeof(u8);
> + val_size -= sizeof(u8);
I'd expect this to generate out of bounds accesses and bad interactions
on the bus if we go through the loop more than once since it appears to
incrementing the address of reg for every register. I'm also having a
hard time understanding why this is doing a read per byte, ssbi_read()
seems to map fairly directly onto the interface of the operation so
there doesn't seem to be any reason for this loop to exist in the first
place.
Has this been tested?
It'd be helpful to CC the entire series, or at least the patches this
builds on...
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next prev parent reply other threads:[~2013-12-10 23:50 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-10 23:35 [PATCH 0/8] Modernize pm8921 with irqdomains + regmap Stephen Boyd
2013-12-10 23:35 ` [PATCH 1/8] mfd: ssbi: Remove platform data structs and hide ssbi type enum Stephen Boyd
2013-12-11 9:27 ` Lee Jones
2013-12-10 23:35 ` [PATCH 2/8] mfd: ssbi: Constify buffer in ssbi_write Stephen Boyd
2013-12-11 9:28 ` Lee Jones
2013-12-10 23:35 ` [PATCH 3/8] regmap: Add support for using regmap over ssbi Stephen Boyd
2013-12-10 23:50 ` Mark Brown [this message]
2013-12-11 0:13 ` Stephen Boyd
2013-12-11 0:51 ` Mark Brown
2013-12-11 1:32 ` Stephen Boyd
2013-12-11 13:27 ` Mark Brown
2013-12-12 23:13 ` Stephen Boyd
2013-12-13 10:41 ` Mark Brown
2013-12-13 17:14 ` [PATCH] regmap: Allow regmap_bulk_read() to work for "no-bus" regmaps Stephen Boyd
2013-12-16 20:57 ` Mark Brown
2013-12-13 21:37 ` [PATCH 3/8] regmap: Add support for using regmap over ssbi Stephen Boyd
2013-12-16 21:01 ` Mark Brown
2013-12-17 2:30 ` [PATCH] regmap: Allow regmap_bulk_write() to work for "no-bus" regmaps Stephen Boyd
2013-12-18 18:45 ` Mark Brown
2013-12-23 20:05 ` Stephen Boyd
2013-12-24 12:53 ` Mark Brown
2013-12-26 19:34 ` Stephen Boyd
2013-12-26 21:52 ` [PATCH v2] " Stephen Boyd
2013-12-30 12:42 ` Mark Brown
2013-12-10 23:35 ` [PATCH 4/8] mfd: ssbi: Mark match table const Stephen Boyd
2013-12-11 9:29 ` Lee Jones
2013-12-10 23:35 ` [PATCH 5/8] mfd: Move pm8xxx-irq.c contents into only driver that uses it Stephen Boyd
2013-12-11 9:35 ` Lee Jones
2013-12-12 19:06 ` Stephen Boyd
2013-12-10 23:35 ` [PATCH 6/8] mfd: pm8921: Update for genirq changes Stephen Boyd
2013-12-11 9:48 ` Lee Jones
2013-12-10 23:35 ` [PATCH 7/8] mfd: pm8921: Migrate to irqdomains Stephen Boyd
2013-12-11 9:53 ` Lee Jones
2013-12-11 21:30 ` Courtney Cavin
2013-12-12 19:05 ` Stephen Boyd
2013-12-10 23:35 ` [PATCH 8/8] mfd: pm8921: Use ssbi regmap Stephen Boyd
2013-12-11 9:55 ` Lee Jones
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