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authorNiklas Cassel <niklas.cassel@axis.com>2015-05-12 10:43:14 +0300
committerDavid S. Miller <davem@davemloft.net>2015-05-13 06:18:40 +0300
commitbced870152161435cc59a53e77f3699f8e8f22ca (patch)
tree9e8fc570004c5c77d5edc5935509dd0e02e94ef3 /drivers/net/phy/micrel.c
parent44d4f8d74e1dd07f248f35d74419f07d44f326e6 (diff)
downloadlinux-bced870152161435cc59a53e77f3699f8e8f22ca.tar.xz
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@vger.kernel.org> # 3.18+ Fixes: 1fadee0c3645 ("net/phy: micrel: Add clock support for KSZ8021/KSZ8031") Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com> Reviewed-by: Johan Hovold <johan@kernel.org> Signed-off-by: Niklas Cassel <niklass@axis.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/phy/micrel.c')
-rw-r--r--drivers/net/phy/micrel.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
index 1190fd8f0088..ebdc357c5131 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;