| Message ID | 20240123160405.360437-2-afd@ti.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | [1/4] hwspinlock: omap: Remove unneeded check for OF node | expand |
On Tue, Jan 23, 2024 at 10:04:03AM -0600, Andrew Davis wrote: > This disables runtime PM on module exit, allowing us to simplify > the probe exit path and remove callbacks. Do that here. As with the later patch, unless I'm misreading the code, you already do disable runtime PM in omap_hwspinlock_remove(). > > Signed-off-by: Andrew Davis <afd@ti.com> > --- > drivers/hwspinlock/omap_hwspinlock.c | 26 ++++++++------------------ > 1 file changed, 8 insertions(+), 18 deletions(-) > > diff --git a/drivers/hwspinlock/omap_hwspinlock.c b/drivers/hwspinlock/omap_hwspinlock.c [..] > @@ -129,16 +125,12 @@ static int omap_hwspinlock_probe(struct platform_device *pdev) > ret = hwspin_lock_register(bank, &pdev->dev, &omap_hwspinlock_ops, > base_id, num_locks); > if (ret) > - goto runtime_err; > + return ret; > > dev_dbg(&pdev->dev, "Registered %d locks with HwSpinlock core\n", > num_locks); I don't fancy these debug information messages, there are other ways to confirm that the device probed successfully etc. Now that you don't need the goto runtime_err, I'd prefer the tail of this function: return hwspin_lock_register(...); Regards, Bjorn > > return 0; > - > -runtime_err: > - pm_runtime_disable(&pdev->dev); > - return ret; > } > > static void omap_hwspinlock_remove(struct platform_device *pdev) > @@ -151,8 +143,6 @@ static void omap_hwspinlock_remove(struct platform_device *pdev) > dev_err(&pdev->dev, "%s failed: %d\n", __func__, ret); > return; > } > - > - pm_runtime_disable(&pdev->dev); > } > > static const struct of_device_id omap_hwspinlock_of_match[] = { > -- > 2.39.2 >
On 2/6/24 1:06 PM, Bjorn Andersson wrote: > On Tue, Jan 23, 2024 at 10:04:03AM -0600, Andrew Davis wrote: >> This disables runtime PM on module exit, allowing us to simplify >> the probe exit path and remove callbacks. Do that here. > > As with the later patch, unless I'm misreading the code, you already do > disable runtime PM in omap_hwspinlock_remove(). > Right, what I meant to say in the commit message was "This disables runtime PM on module exit *automatically for us*.." As in we don't have to manually do it anymore, and that simplifies the code, which is the "fix" that this patch does. Will update the commit message to make that more clear in this and the next patch. >> >> Signed-off-by: Andrew Davis <afd@ti.com> >> --- >> drivers/hwspinlock/omap_hwspinlock.c | 26 ++++++++------------------ >> 1 file changed, 8 insertions(+), 18 deletions(-) >> >> diff --git a/drivers/hwspinlock/omap_hwspinlock.c b/drivers/hwspinlock/omap_hwspinlock.c > [..] >> @@ -129,16 +125,12 @@ static int omap_hwspinlock_probe(struct platform_device *pdev) >> ret = hwspin_lock_register(bank, &pdev->dev, &omap_hwspinlock_ops, >> base_id, num_locks); >> if (ret) >> - goto runtime_err; >> + return ret; >> >> dev_dbg(&pdev->dev, "Registered %d locks with HwSpinlock core\n", >> num_locks); > > I don't fancy these debug information messages, there are other ways to > confirm that the device probed successfully etc. > > Now that you don't need the goto runtime_err, I'd prefer the tail of > this function: > > return hwspin_lock_register(...); > Sure, will update. Thanks, Andrew > Regards, > Bjorn > >> >> return 0; >> - >> -runtime_err: >> - pm_runtime_disable(&pdev->dev); >> - return ret; >> } >> >> static void omap_hwspinlock_remove(struct platform_device *pdev) >> @@ -151,8 +143,6 @@ static void omap_hwspinlock_remove(struct platform_device *pdev) >> dev_err(&pdev->dev, "%s failed: %d\n", __func__, ret); >> return; >> } >> - >> - pm_runtime_disable(&pdev->dev); >> } >> >> static const struct of_device_id omap_hwspinlock_of_match[] = { >> -- >> 2.39.2 >>
diff --git a/drivers/hwspinlock/omap_hwspinlock.c b/drivers/hwspinlock/omap_hwspinlock.c index cca55143d24d4..2f18ea6c05e3f 100644 --- a/drivers/hwspinlock/omap_hwspinlock.c +++ b/drivers/hwspinlock/omap_hwspinlock.c @@ -89,10 +89,10 @@ static int omap_hwspinlock_probe(struct platform_device *pdev) * make sure the module is enabled and clocked before reading * the module SYSSTATUS register */ - pm_runtime_enable(&pdev->dev); + devm_pm_runtime_enable(&pdev->dev); ret = pm_runtime_resume_and_get(&pdev->dev); if (ret < 0) - goto runtime_err; + return ret; /* Determine number of locks */ i = readl(io_base + SYSSTATUS_OFFSET); @@ -104,22 +104,18 @@ static int omap_hwspinlock_probe(struct platform_device *pdev) */ ret = pm_runtime_put(&pdev->dev); if (ret < 0) - goto runtime_err; + return ret; /* one of the four lsb's must be set, and nothing else */ - if (hweight_long(i & 0xf) != 1 || i > 8) { - ret = -EINVAL; - goto runtime_err; - } + if (hweight_long(i & 0xf) != 1 || i > 8) + return -EINVAL; num_locks = i * 32; /* actual number of locks in this device */ bank = devm_kzalloc(&pdev->dev, struct_size(bank, lock, num_locks), GFP_KERNEL); - if (!bank) { - ret = -ENOMEM; - goto runtime_err; - } + if (!bank) + return -ENOMEM; platform_set_drvdata(pdev, bank); @@ -129,16 +125,12 @@ static int omap_hwspinlock_probe(struct platform_device *pdev) ret = hwspin_lock_register(bank, &pdev->dev, &omap_hwspinlock_ops, base_id, num_locks); if (ret) - goto runtime_err; + return ret; dev_dbg(&pdev->dev, "Registered %d locks with HwSpinlock core\n", num_locks); return 0; - -runtime_err: - pm_runtime_disable(&pdev->dev); - return ret; } static void omap_hwspinlock_remove(struct platform_device *pdev) @@ -151,8 +143,6 @@ static void omap_hwspinlock_remove(struct platform_device *pdev) dev_err(&pdev->dev, "%s failed: %d\n", __func__, ret); return; } - - pm_runtime_disable(&pdev->dev); } static const struct of_device_id omap_hwspinlock_of_match[] = {
This disables runtime PM on module exit, allowing us to simplify the probe exit path and remove callbacks. Do that here. Signed-off-by: Andrew Davis <afd@ti.com> --- drivers/hwspinlock/omap_hwspinlock.c | 26 ++++++++------------------ 1 file changed, 8 insertions(+), 18 deletions(-)