| Message ID | 1502277263-187898-1-git-send-email-shawn.lin@rock-chips.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
On Wed, Aug 09, 2017 at 07:14:23PM +0800, Shawn Lin wrote: > We observed that the clk_pciephy_ref is still enabled when we actually > fail to probe the driver. > > root@linaro-alip:~# cat /sys/kernel/debug/clk/clk_summary | grep pcie > clk_pciephy_ref 1 1 24000000 0 0 > clk_pcie_pm 0 0 24000000 0 0 > clk_pcie_core_cru 0 0 125000000 0 0 > clk_pciephy_ref100m 0 0 100000000 0 0 > aclk_pcie 0 0 148500000 0 0 > aclk_perf_pcie 0 0 148500000 0 0 > pclk_pcie 0 0 37125000 0 0 > clk_pcie_core 0 0 0 0 0 > > clk_pciephy_ref is used by phy driver and we need to properly disable > it for this case. So this patch add error handle for the function of > rockchip_pcie_init_port to fix this issue. > > Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com> Applied to pci/host-rockchip for v4.14, thanks! > --- > > drivers/pci/host/pcie-rockchip.c | 38 ++++++++++++++++++++++++-------------- > 1 file changed, 24 insertions(+), 14 deletions(-) > > diff --git a/drivers/pci/host/pcie-rockchip.c b/drivers/pci/host/pcie-rockchip.c > index 2eccd53..ce6371b 100644 > --- a/drivers/pci/host/pcie-rockchip.c > +++ b/drivers/pci/host/pcie-rockchip.c > @@ -561,32 +561,32 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip) > err = phy_init(rockchip->phys[i]); > if (err) { > dev_err(dev, "init phy%d err %d\n", i, err); > - return err; > + goto err_phy_exit; > } > } > > err = reset_control_assert(rockchip->core_rst); > if (err) { > dev_err(dev, "assert core_rst err %d\n", err); > - return err; > + goto err_phy_exit; > } > > err = reset_control_assert(rockchip->mgmt_rst); > if (err) { > dev_err(dev, "assert mgmt_rst err %d\n", err); > - return err; > + goto err_phy_exit; > } > > err = reset_control_assert(rockchip->mgmt_sticky_rst); > if (err) { > dev_err(dev, "assert mgmt_sticky_rst err %d\n", err); > - return err; > + goto err_phy_exit; > } > > err = reset_control_assert(rockchip->pipe_rst); > if (err) { > dev_err(dev, "assert pipe_rst err %d\n", err); > - return err; > + goto err_phy_exit; > } > > udelay(10); > @@ -594,19 +594,19 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip) > err = reset_control_deassert(rockchip->pm_rst); > if (err) { > dev_err(dev, "deassert pm_rst err %d\n", err); > - return err; > + goto err_phy_exit; > } > > err = reset_control_deassert(rockchip->aclk_rst); > if (err) { > dev_err(dev, "deassert aclk_rst err %d\n", err); > - return err; > + goto err_phy_exit; > } > > err = reset_control_deassert(rockchip->pclk_rst); > if (err) { > dev_err(dev, "deassert pclk_rst err %d\n", err); > - return err; > + goto err_phy_exit; > } > > if (rockchip->link_gen == 2) > @@ -628,7 +628,7 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip) > err = phy_power_on(rockchip->phys[i]); > if (err) { > dev_err(dev, "power on phy%d err %d\n", i, err); > - return err; > + goto err_phy_power_off; > } > } > > @@ -639,25 +639,25 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip) > err = reset_control_deassert(rockchip->mgmt_sticky_rst); > if (err) { > dev_err(dev, "deassert mgmt_sticky_rst err %d\n", err); > - return err; > + goto err_phy_power_off; > } > > err = reset_control_deassert(rockchip->core_rst); > if (err) { > dev_err(dev, "deassert core_rst err %d\n", err); > - return err; > + goto err_phy_power_off; > } > > err = reset_control_deassert(rockchip->mgmt_rst); > if (err) { > dev_err(dev, "deassert mgmt_rst err %d\n", err); > - return err; > + goto err_phy_power_off; > } > > err = reset_control_deassert(rockchip->pipe_rst); > if (err) { > dev_err(dev, "deassert pipe_rst err %d\n", err); > - return err; > + goto err_phy_power_off; > } > > /* Fix the transmitted FTS count desired to exit from L0s. */ > @@ -690,7 +690,8 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip) > 500 * USEC_PER_MSEC); > if (err) { > dev_err(dev, "PCIe link training gen1 timeout!\n"); > - return -ETIMEDOUT; > + err = -ETIMEDOUT; > + goto err_phy_power_off; > } > > if (rockchip->link_gen == 2) { > @@ -751,6 +752,15 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip) > rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_DCSR); > > return 0; > + > +err_phy_exit: > + for (; i >= 0; --i) > + phy_exit(rockchip->phys[i]); > +err_phy_power_off: > + for (; i >= 0; --i) > + phy_power_off(rockchip->phys[i]); > + > + return err; > } > > static irqreturn_t rockchip_pcie_subsys_irq_handler(int irq, void *arg) > -- > 1.9.1 > >
Hi Bjorn, On 2017/8/23 4:47, Bjorn Helgaas wrote: > On Wed, Aug 09, 2017 at 07:14:23PM +0800, Shawn Lin wrote: >> We observed that the clk_pciephy_ref is still enabled when we actually >> fail to probe the driver. >> >> root@linaro-alip:~# cat /sys/kernel/debug/clk/clk_summary | grep pcie >> clk_pciephy_ref 1 1 24000000 0 0 >> clk_pcie_pm 0 0 24000000 0 0 >> clk_pcie_core_cru 0 0 125000000 0 0 >> clk_pciephy_ref100m 0 0 100000000 0 0 >> aclk_pcie 0 0 148500000 0 0 >> aclk_perf_pcie 0 0 148500000 0 0 >> pclk_pcie 0 0 37125000 0 0 >> clk_pcie_core 0 0 0 0 0 >> >> clk_pciephy_ref is used by phy driver and we need to properly disable >> it for this case. So this patch add error handle for the function of >> rockchip_pcie_init_port to fix this issue. >> >> Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com> > > Applied to pci/host-rockchip for v4.14, thanks! I actually posted a v2 sometime ago, so could you please drop this one? And there are still some other error handling path should be fixed. So I think that is what Jeffy's patch did: http://patchwork.ozlabs.org/patch/804239/ > >> --- >> >> drivers/pci/host/pcie-rockchip.c | 38 ++++++++++++++++++++++++-------------- >> 1 file changed, 24 insertions(+), 14 deletions(-) >> >> diff --git a/drivers/pci/host/pcie-rockchip.c b/drivers/pci/host/pcie-rockchip.c >> index 2eccd53..ce6371b 100644 >> --- a/drivers/pci/host/pcie-rockchip.c >> +++ b/drivers/pci/host/pcie-rockchip.c >> @@ -561,32 +561,32 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip) >> err = phy_init(rockchip->phys[i]); >> if (err) { >> dev_err(dev, "init phy%d err %d\n", i, err); >> - return err; >> + goto err_phy_exit; >> } >> } >> >> err = reset_control_assert(rockchip->core_rst); >> if (err) { >> dev_err(dev, "assert core_rst err %d\n", err); >> - return err; >> + goto err_phy_exit; >> } >> >> err = reset_control_assert(rockchip->mgmt_rst); >> if (err) { >> dev_err(dev, "assert mgmt_rst err %d\n", err); >> - return err; >> + goto err_phy_exit; >> } >> >> err = reset_control_assert(rockchip->mgmt_sticky_rst); >> if (err) { >> dev_err(dev, "assert mgmt_sticky_rst err %d\n", err); >> - return err; >> + goto err_phy_exit; >> } >> >> err = reset_control_assert(rockchip->pipe_rst); >> if (err) { >> dev_err(dev, "assert pipe_rst err %d\n", err); >> - return err; >> + goto err_phy_exit; >> } >> >> udelay(10); >> @@ -594,19 +594,19 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip) >> err = reset_control_deassert(rockchip->pm_rst); >> if (err) { >> dev_err(dev, "deassert pm_rst err %d\n", err); >> - return err; >> + goto err_phy_exit; >> } >> >> err = reset_control_deassert(rockchip->aclk_rst); >> if (err) { >> dev_err(dev, "deassert aclk_rst err %d\n", err); >> - return err; >> + goto err_phy_exit; >> } >> >> err = reset_control_deassert(rockchip->pclk_rst); >> if (err) { >> dev_err(dev, "deassert pclk_rst err %d\n", err); >> - return err; >> + goto err_phy_exit; >> } >> >> if (rockchip->link_gen == 2) >> @@ -628,7 +628,7 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip) >> err = phy_power_on(rockchip->phys[i]); >> if (err) { >> dev_err(dev, "power on phy%d err %d\n", i, err); >> - return err; >> + goto err_phy_power_off; >> } >> } >> >> @@ -639,25 +639,25 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip) >> err = reset_control_deassert(rockchip->mgmt_sticky_rst); >> if (err) { >> dev_err(dev, "deassert mgmt_sticky_rst err %d\n", err); >> - return err; >> + goto err_phy_power_off; >> } >> >> err = reset_control_deassert(rockchip->core_rst); >> if (err) { >> dev_err(dev, "deassert core_rst err %d\n", err); >> - return err; >> + goto err_phy_power_off; >> } >> >> err = reset_control_deassert(rockchip->mgmt_rst); >> if (err) { >> dev_err(dev, "deassert mgmt_rst err %d\n", err); >> - return err; >> + goto err_phy_power_off; >> } >> >> err = reset_control_deassert(rockchip->pipe_rst); >> if (err) { >> dev_err(dev, "deassert pipe_rst err %d\n", err); >> - return err; >> + goto err_phy_power_off; >> } >> >> /* Fix the transmitted FTS count desired to exit from L0s. */ >> @@ -690,7 +690,8 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip) >> 500 * USEC_PER_MSEC); >> if (err) { >> dev_err(dev, "PCIe link training gen1 timeout!\n"); >> - return -ETIMEDOUT; >> + err = -ETIMEDOUT; >> + goto err_phy_power_off; >> } >> >> if (rockchip->link_gen == 2) { >> @@ -751,6 +752,15 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip) >> rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_DCSR); >> >> return 0; >> + >> +err_phy_exit: >> + for (; i >= 0; --i) >> + phy_exit(rockchip->phys[i]); >> +err_phy_power_off: >> + for (; i >= 0; --i) >> + phy_power_off(rockchip->phys[i]); >> + >> + return err; >> } >> >> static irqreturn_t rockchip_pcie_subsys_irq_handler(int irq, void *arg) >> -- >> 1.9.1 >> >> > > >
On 2017/8/23 9:03, Shawn Lin wrote: > Hi Bjorn, > > On 2017/8/23 4:47, Bjorn Helgaas wrote: >> On Wed, Aug 09, 2017 at 07:14:23PM +0800, Shawn Lin wrote: >>> We observed that the clk_pciephy_ref is still enabled when we actually >>> fail to probe the driver. >>> >>> root@linaro-alip:~# cat /sys/kernel/debug/clk/clk_summary | grep pcie >>> clk_pciephy_ref 1 1 24000000 0 0 >>> clk_pcie_pm 0 0 24000000 0 0 >>> clk_pcie_core_cru 0 0 125000000 0 0 >>> clk_pciephy_ref100m 0 0 100000000 0 0 >>> aclk_pcie 0 0 148500000 0 0 >>> aclk_perf_pcie 0 0 148500000 0 0 >>> pclk_pcie 0 0 37125000 0 0 >>> clk_pcie_core 0 0 0 0 0 >>> >>> clk_pciephy_ref is used by phy driver and we need to properly disable >>> it for this case. So this patch add error handle for the function of >>> rockchip_pcie_init_port to fix this issue. >>> >>> Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com> >> >> Applied to pci/host-rockchip for v4.14, thanks! > > I actually posted a v2 sometime ago, so could you please drop this one? > > And there are still some other error handling path should be fixed. > So I think that is what Jeffy's patch did: > > http://patchwork.ozlabs.org/patch/804239/ > Just talk to Jeffy off-list and we agree that there are many patches for pcie-rockchip in flight that conflict each other. So I would like to pick up all these patches, including the bug-fixing for shared irq and reconstruction, and send out the a bigger series which would make you easy to review and avoid rebasing pathes for others. > >> >>> --- >>> >>> drivers/pci/host/pcie-rockchip.c | 38 >>> ++++++++++++++++++++++++-------------- >>> 1 file changed, 24 insertions(+), 14 deletions(-) >>> >>> diff --git a/drivers/pci/host/pcie-rockchip.c >>> b/drivers/pci/host/pcie-rockchip.c >>> index 2eccd53..ce6371b 100644 >>> --- a/drivers/pci/host/pcie-rockchip.c >>> +++ b/drivers/pci/host/pcie-rockchip.c >>> @@ -561,32 +561,32 @@ static int rockchip_pcie_init_port(struct >>> rockchip_pcie *rockchip) >>> err = phy_init(rockchip->phys[i]); >>> if (err) { >>> dev_err(dev, "init phy%d err %d\n", i, err); >>> - return err; >>> + goto err_phy_exit; >>> } >>> } >>> err = reset_control_assert(rockchip->core_rst); >>> if (err) { >>> dev_err(dev, "assert core_rst err %d\n", err); >>> - return err; >>> + goto err_phy_exit; >>> } >>> err = reset_control_assert(rockchip->mgmt_rst); >>> if (err) { >>> dev_err(dev, "assert mgmt_rst err %d\n", err); >>> - return err; >>> + goto err_phy_exit; >>> } >>> err = reset_control_assert(rockchip->mgmt_sticky_rst); >>> if (err) { >>> dev_err(dev, "assert mgmt_sticky_rst err %d\n", err); >>> - return err; >>> + goto err_phy_exit; >>> } >>> err = reset_control_assert(rockchip->pipe_rst); >>> if (err) { >>> dev_err(dev, "assert pipe_rst err %d\n", err); >>> - return err; >>> + goto err_phy_exit; >>> } >>> udelay(10); >>> @@ -594,19 +594,19 @@ static int rockchip_pcie_init_port(struct >>> rockchip_pcie *rockchip) >>> err = reset_control_deassert(rockchip->pm_rst); >>> if (err) { >>> dev_err(dev, "deassert pm_rst err %d\n", err); >>> - return err; >>> + goto err_phy_exit; >>> } >>> err = reset_control_deassert(rockchip->aclk_rst); >>> if (err) { >>> dev_err(dev, "deassert aclk_rst err %d\n", err); >>> - return err; >>> + goto err_phy_exit; >>> } >>> err = reset_control_deassert(rockchip->pclk_rst); >>> if (err) { >>> dev_err(dev, "deassert pclk_rst err %d\n", err); >>> - return err; >>> + goto err_phy_exit; >>> } >>> if (rockchip->link_gen == 2) >>> @@ -628,7 +628,7 @@ static int rockchip_pcie_init_port(struct >>> rockchip_pcie *rockchip) >>> err = phy_power_on(rockchip->phys[i]); >>> if (err) { >>> dev_err(dev, "power on phy%d err %d\n", i, err); >>> - return err; >>> + goto err_phy_power_off; >>> } >>> } >>> @@ -639,25 +639,25 @@ static int rockchip_pcie_init_port(struct >>> rockchip_pcie *rockchip) >>> err = reset_control_deassert(rockchip->mgmt_sticky_rst); >>> if (err) { >>> dev_err(dev, "deassert mgmt_sticky_rst err %d\n", err); >>> - return err; >>> + goto err_phy_power_off; >>> } >>> err = reset_control_deassert(rockchip->core_rst); >>> if (err) { >>> dev_err(dev, "deassert core_rst err %d\n", err); >>> - return err; >>> + goto err_phy_power_off; >>> } >>> err = reset_control_deassert(rockchip->mgmt_rst); >>> if (err) { >>> dev_err(dev, "deassert mgmt_rst err %d\n", err); >>> - return err; >>> + goto err_phy_power_off; >>> } >>> err = reset_control_deassert(rockchip->pipe_rst); >>> if (err) { >>> dev_err(dev, "deassert pipe_rst err %d\n", err); >>> - return err; >>> + goto err_phy_power_off; >>> } >>> /* Fix the transmitted FTS count desired to exit from L0s. */ >>> @@ -690,7 +690,8 @@ static int rockchip_pcie_init_port(struct >>> rockchip_pcie *rockchip) >>> 500 * USEC_PER_MSEC); >>> if (err) { >>> dev_err(dev, "PCIe link training gen1 timeout!\n"); >>> - return -ETIMEDOUT; >>> + err = -ETIMEDOUT; >>> + goto err_phy_power_off; >>> } >>> if (rockchip->link_gen == 2) { >>> @@ -751,6 +752,15 @@ static int rockchip_pcie_init_port(struct >>> rockchip_pcie *rockchip) >>> rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_DCSR); >>> return 0; >>> + >>> +err_phy_exit: >>> + for (; i >= 0; --i) >>> + phy_exit(rockchip->phys[i]); >>> +err_phy_power_off: >>> + for (; i >= 0; --i) >>> + phy_power_off(rockchip->phys[i]); >>> + >>> + return err; >>> } >>> static irqreturn_t rockchip_pcie_subsys_irq_handler(int irq, void >>> *arg) >>> -- >>> 1.9.1 >>> >>> >> >> >> > > >
On Wed, Aug 23, 2017 at 09:03:04AM +0800, Shawn Lin wrote: > Hi Bjorn, > > On 2017/8/23 4:47, Bjorn Helgaas wrote: > >On Wed, Aug 09, 2017 at 07:14:23PM +0800, Shawn Lin wrote: > >>We observed that the clk_pciephy_ref is still enabled when we actually > >>fail to probe the driver. > >> > >>root@linaro-alip:~# cat /sys/kernel/debug/clk/clk_summary | grep pcie > >>clk_pciephy_ref 1 1 24000000 0 0 > >>clk_pcie_pm 0 0 24000000 0 0 > >> clk_pcie_core_cru 0 0 125000000 0 0 > >> clk_pciephy_ref100m 0 0 100000000 0 0 > >> aclk_pcie 0 0 148500000 0 0 > >> aclk_perf_pcie 0 0 148500000 0 0 > >> pclk_pcie 0 0 37125000 0 0 > >>clk_pcie_core 0 0 0 0 0 > >> > >>clk_pciephy_ref is used by phy driver and we need to properly disable > >>it for this case. So this patch add error handle for the function of > >>rockchip_pcie_init_port to fix this issue. > >> > >>Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com> > > > >Applied to pci/host-rockchip for v4.14, thanks! > > I actually posted a v2 sometime ago, so could you please drop this one? Oops, sorry. I dropped this one and will pick it up from the new v5 series you posted. Bjorn
diff --git a/drivers/pci/host/pcie-rockchip.c b/drivers/pci/host/pcie-rockchip.c index 2eccd53..ce6371b 100644 --- a/drivers/pci/host/pcie-rockchip.c +++ b/drivers/pci/host/pcie-rockchip.c @@ -561,32 +561,32 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip) err = phy_init(rockchip->phys[i]); if (err) { dev_err(dev, "init phy%d err %d\n", i, err); - return err; + goto err_phy_exit; } } err = reset_control_assert(rockchip->core_rst); if (err) { dev_err(dev, "assert core_rst err %d\n", err); - return err; + goto err_phy_exit; } err = reset_control_assert(rockchip->mgmt_rst); if (err) { dev_err(dev, "assert mgmt_rst err %d\n", err); - return err; + goto err_phy_exit; } err = reset_control_assert(rockchip->mgmt_sticky_rst); if (err) { dev_err(dev, "assert mgmt_sticky_rst err %d\n", err); - return err; + goto err_phy_exit; } err = reset_control_assert(rockchip->pipe_rst); if (err) { dev_err(dev, "assert pipe_rst err %d\n", err); - return err; + goto err_phy_exit; } udelay(10); @@ -594,19 +594,19 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip) err = reset_control_deassert(rockchip->pm_rst); if (err) { dev_err(dev, "deassert pm_rst err %d\n", err); - return err; + goto err_phy_exit; } err = reset_control_deassert(rockchip->aclk_rst); if (err) { dev_err(dev, "deassert aclk_rst err %d\n", err); - return err; + goto err_phy_exit; } err = reset_control_deassert(rockchip->pclk_rst); if (err) { dev_err(dev, "deassert pclk_rst err %d\n", err); - return err; + goto err_phy_exit; } if (rockchip->link_gen == 2) @@ -628,7 +628,7 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip) err = phy_power_on(rockchip->phys[i]); if (err) { dev_err(dev, "power on phy%d err %d\n", i, err); - return err; + goto err_phy_power_off; } } @@ -639,25 +639,25 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip) err = reset_control_deassert(rockchip->mgmt_sticky_rst); if (err) { dev_err(dev, "deassert mgmt_sticky_rst err %d\n", err); - return err; + goto err_phy_power_off; } err = reset_control_deassert(rockchip->core_rst); if (err) { dev_err(dev, "deassert core_rst err %d\n", err); - return err; + goto err_phy_power_off; } err = reset_control_deassert(rockchip->mgmt_rst); if (err) { dev_err(dev, "deassert mgmt_rst err %d\n", err); - return err; + goto err_phy_power_off; } err = reset_control_deassert(rockchip->pipe_rst); if (err) { dev_err(dev, "deassert pipe_rst err %d\n", err); - return err; + goto err_phy_power_off; } /* Fix the transmitted FTS count desired to exit from L0s. */ @@ -690,7 +690,8 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip) 500 * USEC_PER_MSEC); if (err) { dev_err(dev, "PCIe link training gen1 timeout!\n"); - return -ETIMEDOUT; + err = -ETIMEDOUT; + goto err_phy_power_off; } if (rockchip->link_gen == 2) { @@ -751,6 +752,15 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip) rockchip_pcie_write(rockchip, status, PCIE_RC_CONFIG_DCSR); return 0; + +err_phy_exit: + for (; i >= 0; --i) + phy_exit(rockchip->phys[i]); +err_phy_power_off: + for (; i >= 0; --i) + phy_power_off(rockchip->phys[i]); + + return err; } static irqreturn_t rockchip_pcie_subsys_irq_handler(int irq, void *arg)
We observed that the clk_pciephy_ref is still enabled when we actually fail to probe the driver. root@linaro-alip:~# cat /sys/kernel/debug/clk/clk_summary | grep pcie clk_pciephy_ref 1 1 24000000 0 0 clk_pcie_pm 0 0 24000000 0 0 clk_pcie_core_cru 0 0 125000000 0 0 clk_pciephy_ref100m 0 0 100000000 0 0 aclk_pcie 0 0 148500000 0 0 aclk_perf_pcie 0 0 148500000 0 0 pclk_pcie 0 0 37125000 0 0 clk_pcie_core 0 0 0 0 0 clk_pciephy_ref is used by phy driver and we need to properly disable it for this case. So this patch add error handle for the function of rockchip_pcie_init_port to fix this issue. Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com> --- drivers/pci/host/pcie-rockchip.c | 38 ++++++++++++++++++++++++-------------- 1 file changed, 24 insertions(+), 14 deletions(-)