3.19.8-ckt2 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Niklas Cassel <niklas.cassel@xxxxxxxx>
commit bced870152161435cc59a53e77f3699f8e8f22ca upstream.
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.
Fixes: 1fadee0c3645 ("net/phy: micrel: Add clock support for
KSZ8021/KSZ8031")
Reviewed-by: Fabio Estevam <fabio.estevam@xxxxxxxxxxxxx>
Reviewed-by: Johan Hovold <johan@xxxxxxxxxx>
Signed-off-by: Niklas Cassel <niklass@xxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
---
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 3ad8ca7..96061fc 100644
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -520,7 +520,8 @@ 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;
--
1.9.1
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