forked from luck/tmp_suning_uos_patched
usb: phy: tegra: Move utmip_pad_count checking under lock
It's unlikely that two drivers could manage PHY's state simultaneously in practice, nevertheless the utmip_pad_count checking should be under lock, for consistency. Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Link: https://lore.kernel.org/r/20200106013416.9604-16-digetx@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -348,30 +348,31 @@ static int utmip_pad_power_off(struct tegra_usb_phy *phy)
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void __iomem *base = phy->pad_regs;
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void __iomem *base = phy->pad_regs;
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unsigned long flags;
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unsigned long flags;
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u32 val;
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u32 val;
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int err;
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int ret;
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ret = clk_prepare_enable(phy->pad_clk);
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if (ret)
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return ret;
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spin_lock_irqsave(&utmip_pad_lock, flags);
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if (!utmip_pad_count) {
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if (!utmip_pad_count) {
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dev_err(phy->u_phy.dev, "UTMIP pad already powered off\n");
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dev_err(phy->u_phy.dev, "UTMIP pad already powered off\n");
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return -EINVAL;
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ret = -EINVAL;
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goto ulock;
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}
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}
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err = clk_prepare_enable(phy->pad_clk);
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if (err)
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return err;
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spin_lock_irqsave(&utmip_pad_lock, flags);
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if (--utmip_pad_count == 0) {
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if (--utmip_pad_count == 0) {
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val = readl_relaxed(base + UTMIP_BIAS_CFG0);
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val = readl_relaxed(base + UTMIP_BIAS_CFG0);
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val |= UTMIP_OTGPD | UTMIP_BIASPD;
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val |= UTMIP_OTGPD | UTMIP_BIASPD;
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writel_relaxed(val, base + UTMIP_BIAS_CFG0);
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writel_relaxed(val, base + UTMIP_BIAS_CFG0);
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}
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}
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ulock:
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spin_unlock_irqrestore(&utmip_pad_lock, flags);
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spin_unlock_irqrestore(&utmip_pad_lock, flags);
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clk_disable_unprepare(phy->pad_clk);
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clk_disable_unprepare(phy->pad_clk);
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return 0;
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return ret;
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}
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}
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static int utmi_wait_register(void __iomem *reg, u32 mask, u32 result)
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static int utmi_wait_register(void __iomem *reg, u32 mask, u32 result)
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