From: Leo Yan <leo.yan@linaro.org>
To: Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@codeaurora.org>, Leo Yan <leo.yan@linaro.org>,
linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org,
Haojian Zhuang <haojian.zhuang@linaro.org>,
Guodong Xu <guodong.xu@linaro.org>,
John Stultz <john.stultz@linaro.org>
Subject: [PATCH] clk: hisilicon: fix lock assignment
Date: Wed, 18 Jan 2017 16:13:38 +0800 [thread overview]
Message-ID: <1484727218-3499-1-git-send-email-leo.yan@linaro.org> (raw)
In clock driver initialize phase the spinlock is missed to assignment
to struct clkgate_separated, finally there have no locking to protect
exclusive accessing for clock registers.
This bug introduces the console has no output after enable coresight
driver on 96borads Hikey; this is because console using UART3, which
has shared the same register with coresight clock enabling bit. After
applied this patch it can assign lock properly to protect exclusive
accessing, and console can work well after enabled coresight modules.
Signed-off-by: Leo Yan <leo.yan@linaro.org>
---
drivers/clk/hisilicon/clkgate-separated.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/clk/hisilicon/clkgate-separated.c b/drivers/clk/hisilicon/clkgate-separated.c
index a47812f..7908bc3 100644
--- a/drivers/clk/hisilicon/clkgate-separated.c
+++ b/drivers/clk/hisilicon/clkgate-separated.c
@@ -120,6 +120,7 @@ struct clk *hisi_register_clkgate_sep(struct device *dev, const char *name,
sclk->bit_idx = bit_idx;
sclk->flags = clk_gate_flags;
sclk->hw.init = &init;
+ sclk->lock = lock;
clk = clk_register(dev, &sclk->hw);
if (IS_ERR(clk))
--
2.7.4
next reply other threads:[~2017-01-18 8:13 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-18 8:13 Leo Yan [this message]
2017-01-20 22:58 ` [PATCH] clk: hisilicon: fix lock assignment Stephen Boyd
2017-01-21 2:16 ` Leo Yan
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=1484727218-3499-1-git-send-email-leo.yan@linaro.org \
--to=leo.yan@linaro.org \
--cc=guodong.xu@linaro.org \
--cc=haojian.zhuang@linaro.org \
--cc=john.stultz@linaro.org \
--cc=linux-clk@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mturquette@baylibre.com \
--cc=sboyd@codeaurora.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