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| author | Stefan Wahren <stefan.wahren@i2se.com> | 2015-06-15 06:37:00 +0200 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2015-07-06 19:34:08 +0200 |
| commit | 543aa4867d4a2dff5fc11e1b688197ee3bad7f89 (patch) | |
| tree | 3b41e60a230bf09b9fab76565932f8f5cf1a9517 /drivers/usb/phy/phy-mxs-usb.c | |
| parent | usb: gadget: udc: fix free_irq() after request_irq() failed (diff) | |
| download | linux-543aa4867d4a2dff5fc11e1b688197ee3bad7f89.tar.xz linux-543aa4867d4a2dff5fc11e1b688197ee3bad7f89.zip | |
usb: phy: mxs: suspend to RAM causes NULL pointer dereference
Triggering suspend to RAM via sysfs on a i.MX28 causes a NULL pointer
dereference. This patch avoids the oops in mxs_phy_get_vbus_status()
by aborting since there is no syscon available.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Fixes: efdbd3a5d6e ("usb: phy: mxs: do not set PWD.RXPWD1PT1 for low speed connection")
CC: <stable@vger.kernel.org> # 4.0
Acked-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/phy/phy-mxs-usb.c')
| -rw-r--r-- | drivers/usb/phy/phy-mxs-usb.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/usb/phy/phy-mxs-usb.c b/drivers/usb/phy/phy-mxs-usb.c index 8f7cb068d29b..3fcc0483a081 100644 --- a/drivers/usb/phy/phy-mxs-usb.c +++ b/drivers/usb/phy/phy-mxs-usb.c @@ -217,6 +217,9 @@ static bool mxs_phy_get_vbus_status(struct mxs_phy *mxs_phy) { unsigned int vbus_value; + if (!mxs_phy->regmap_anatop) + return false; + if (mxs_phy->port_id == 0) regmap_read(mxs_phy->regmap_anatop, ANADIG_USB1_VBUS_DET_STAT, |