diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-10-12 11:17:34 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-10-12 11:17:34 +0200 |
| commit | 2d30408ecfd450c8377186615b330d329ded18ea (patch) | |
| tree | c216f8e271bb812e5d6b1b8e63b87a54bb4b7875 /drivers/usb/phy/phy-tegra-usb.c | |
| parent | 47a4b71c0b15be08a0f5e3011e71551a269bbe59 (diff) | |
| parent | 7c80f9e4a588f1925b07134bb2e3689335f6c6d8 (diff) | |
Merge tag 'fixes-for-v4.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-linus
Felipe writes:
USB: fixes for v4.14-rc5
A deadlock fix in dummy-hcd; Fixing a use-after-free bug in composite;
Renesas got another fix for DMA programming (this time around a fix
for receiving ZLP); Tegra PHY got a suspend fix; A memory leak on our
configfs ABI got plugged.
Other than these, a couple other minor fixes on usbtest.
Diffstat (limited to 'drivers/usb/phy/phy-tegra-usb.c')
| -rw-r--r-- | drivers/usb/phy/phy-tegra-usb.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/usb/phy/phy-tegra-usb.c b/drivers/usb/phy/phy-tegra-usb.c index 5fe4a5704bde..ccc2bf5274b4 100644 --- a/drivers/usb/phy/phy-tegra-usb.c +++ b/drivers/usb/phy/phy-tegra-usb.c @@ -329,6 +329,14 @@ static void utmi_phy_clk_disable(struct tegra_usb_phy *phy) unsigned long val; void __iomem *base = phy->regs; + /* + * The USB driver may have already initiated the phy clock + * disable so wait to see if the clock turns off and if not + * then proceed with gating the clock. + */ + if (utmi_wait_register(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID, 0) == 0) + return; + if (phy->is_legacy_phy) { val = readl(base + USB_SUSP_CTRL); val |= USB_SUSP_SET; @@ -351,6 +359,15 @@ static void utmi_phy_clk_enable(struct tegra_usb_phy *phy) unsigned long val; void __iomem *base = phy->regs; + /* + * The USB driver may have already initiated the phy clock + * enable so wait to see if the clock turns on and if not + * then proceed with ungating the clock. + */ + if (utmi_wait_register(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID, + USB_PHY_CLK_VALID) == 0) + return; + if (phy->is_legacy_phy) { val = readl(base + USB_SUSP_CTRL); val |= USB_SUSP_CLR; |