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Message-ID: <1431357666-6808-1-git-send-email-niklass@axis.com>
Date: Mon, 11 May 2015 17:21:06 +0200
From: Niklas Cassel <niklas.cassel@...s.com>
To: <f.fainelli@...il.com>
CC: <festevam@...il.com>, <davem@...emloft.net>,
<netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<johan@...nel.org>, Niklas Cassel <niklass@...s.com>,
stable <stable@...r.kernel.org>
Subject: [PATCH v4] net: phy: micrel: Fix regression in kszphy_probe
Don't do clock-mode-select if clk == NULL,
since when building without CONFIG_HAVE_CLK,
clk_get returns NULL and clk_get_rate returns 0.
Doing clock-mode-select in this cause causes kszphy_probe to
return -EINVAL and thus prevents the device from being probed.
The original code (before regression) would return 0
when building without CONFIG_HAVE_CLK.
Cc: stable <stable@...r.kernel.org> # 3.18+
1fadee0c3645 ("net/phy: micrel: Add clock support for
KSZ8021/KSZ8031")
Signed-off-by: Niklas Cassel <niklass@...s.com>
---
drivers/net/phy/micrel.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
index 1190fd8..ebdc357 100644
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -548,7 +548,8 @@ static int kszphy_probe(struct phy_device *phydev)
}
clk = devm_clk_get(&phydev->dev, "rmii-ref");
- if (!IS_ERR(clk)) {
+ /* NOTE: clk may be NULL if building without CONFIG_HAVE_CLK */
+ if (!IS_ERR_OR_NULL(clk)) {
unsigned long rate = clk_get_rate(clk);
bool rmii_ref_clk_sel_25_mhz;
--
2.1.4
--
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