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46 lines
1.5 KiB
46 lines
1.5 KiB
7 years ago
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From patchwork Tue Jul 18 10:17:26 2017
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Content-Type: text/plain; charset="utf-8"
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MIME-Version: 1.0
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Content-Transfer-Encoding: 7bit
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Subject: [5/9] MIPS: AR7: allow NULL clock for clk_get_rate
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X-Patchwork-Submitter: Jonas Gorski <jonas.gorski@gmail.com>
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X-Patchwork-Id: 16775
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Message-Id: <20170718101730.2541-6-jonas.gorski@gmail.com>
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To: unlisted-recipients:; (no To-header on input)
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Cc: Ralf Baechle <ralf@linux-mips.org>,
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Paul Gortmaker <paul.gortmaker@windriver.com>,
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James Hogan <james.hogan@imgtec.com>,
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linux-mips@linux-mips.org, linux-kernel@vger.kernel.org
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Date: Tue, 18 Jul 2017 12:17:26 +0200
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From: Jonas Gorski <jonas.gorski@gmail.com>
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List-Id: linux-mips <linux-mips.eddie.linux-mips.org>
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Make the behaviour of clk_get_rate consistent with common clk's
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clk_get_rate by accepting NULL clocks as parameter. Some device
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drivers rely on this, and will cause an OOPS otherwise.
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Fixes: 780019ddf02f ("MIPS: AR7: Implement clock API")
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Cc: Ralf Baechle <ralf@linux-mips.org>
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Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
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Cc: James Hogan <james.hogan@imgtec.com>
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Cc: linux-mips@linux-mips.org
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Cc: linux-kernel@vger.kernel.org
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Reported-by: Mathias Kresin <dev@kresin.me>
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Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
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---
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arch/mips/ar7/clock.c | 3 +++
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1 file changed, 3 insertions(+)
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--- a/arch/mips/ar7/clock.c
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+++ b/arch/mips/ar7/clock.c
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@@ -430,6 +430,9 @@ EXPORT_SYMBOL(clk_disable);
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unsigned long clk_get_rate(struct clk *clk)
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{
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+ if (!clk)
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+ return 0;
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+
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return clk->rate;
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}
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EXPORT_SYMBOL(clk_get_rate);
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