From: sboyd@codeaurora.org (Stephen Boyd)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] regmap: Allow regmap_bulk_write() to work for "no-bus" regmaps
Date: Mon, 23 Dec 2013 12:05:53 -0800 [thread overview]
Message-ID: <52B897A1.8030205@codeaurora.org> (raw)
In-Reply-To: <20131218184541.GH31886@sirena.org.uk>
On 12/18/13 10:45, Mark Brown wrote:
> On Mon, Dec 16, 2013 at 06:30:47PM -0800, Stephen Boyd wrote:
>
>> - /* No formatting is require if val_byte is 1 */
>> - if (val_bytes == 1) {
>> - wval = (void *)val;
>> + ival = *(unsigned int *)(val + (i * val_bytes));
>> + ret = _regmap_write(map, reg + (i * map->reg_stride),
>> + ival);
>> + if (ret != 0)
>> + goto out;
> This doesn't quite work - val is an array of objects of the size of the
> size of a register not of unsigned integers so you're parsing extra data
> out there. That possibly wasn't the best choice of API but we have
> quite a few users now so ick.
Are you concerned that we'll read past the end of the val buffer? Do we
need to cast the pointer to be the appropriate size according to
val_bytes? Something like this?
for (i = 0; i < val_count; i++) {
unsigned int ival;
switch (val_bytes) {
case 1:
ival = *(u8 *)(val + (i * val_bytes));
break;
case 2:
ival = *(u16 *)(val + (i * val_bytes));
break;
case 4:
ival = *(u32 *)(val + (i * val_bytes));
break;
#ifdef CONFIG_64BIT
case 8:
ival = *(u64 *)(val + (i * val_bytes));
break;
#endif
default:
ret = -EINVAL;
goto out;
}
ret = _regmap_write(map, reg + (i * map->reg_stride),
ival);
if (ret != 0)
goto out;
}
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
hosted by The Linux Foundation
next prev parent reply other threads:[~2013-12-23 20:05 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
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 [this message]
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=52B897A1.8030205@codeaurora.org \
--to=sboyd@codeaurora.org \
--cc=linux-arm-kernel@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).