From: "Rafael J. Wysocki" <rjw@rjwysocki.net>
To: Linux PM <linux-pm@vger.kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
Tushar Nimkar <quic_tnimkar@quicinc.com>,
Adrian Hunter <adrian.hunter@intel.com>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Nitin Rawat <quic_nitirawa@quicinc.com>,
Peter Wang <peter.wang@mediatek.com>,
Alan Stern <stern@rowland.harvard.edu>,
Ulf Hansson <ulf.hansson@linaro.org>
Subject: [PATCH v1 2/2] PM: runtime: Relocate rpm_callback() right after __rpm_callback()
Date: Fri, 02 Dec 2022 15:32:09 +0100 [thread overview]
Message-ID: <2264402.ElGaqSPkdT@kreacher> (raw)
In-Reply-To: <5627469.DvuYhMxLoT@kreacher>
From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Because rpm_callback() is a wrapper around __rpm_callback(), and the
only caller of it after the change eliminating an invocation of it
from rpm_idle(), move the former next to the latter to make the code
a bit easier to follow.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
drivers/base/power/runtime.c | 64 +++++++++++++++++++++----------------------
1 file changed, 32 insertions(+), 32 deletions(-)
Index: linux-pm/drivers/base/power/runtime.c
===================================================================
--- linux-pm.orig/drivers/base/power/runtime.c
+++ linux-pm/drivers/base/power/runtime.c
@@ -422,6 +422,38 @@ fail:
}
/**
+ * rpm_callback - Run a given runtime PM callback for a given device.
+ * @cb: Runtime PM callback to run.
+ * @dev: Device to run the callback for.
+ */
+static int rpm_callback(int (*cb)(struct device *), struct device *dev)
+{
+ int retval;
+
+ if (dev->power.memalloc_noio) {
+ unsigned int noio_flag;
+
+ /*
+ * Deadlock might be caused if memory allocation with
+ * GFP_KERNEL happens inside runtime_suspend and
+ * runtime_resume callbacks of one block device's
+ * ancestor or the block device itself. Network
+ * device might be thought as part of iSCSI block
+ * device, so network device and its ancestor should
+ * be marked as memalloc_noio too.
+ */
+ noio_flag = memalloc_noio_save();
+ retval = __rpm_callback(cb, dev);
+ memalloc_noio_restore(noio_flag);
+ } else {
+ retval = __rpm_callback(cb, dev);
+ }
+
+ dev->power.runtime_error = retval;
+ return retval != -EACCES ? retval : -EIO;
+}
+
+/**
* rpm_idle - Notify device bus type if the device can be suspended.
* @dev: Device to notify the bus type about.
* @rpmflags: Flag bits.
@@ -505,38 +537,6 @@ static int rpm_idle(struct device *dev,
}
/**
- * rpm_callback - Run a given runtime PM callback for a given device.
- * @cb: Runtime PM callback to run.
- * @dev: Device to run the callback for.
- */
-static int rpm_callback(int (*cb)(struct device *), struct device *dev)
-{
- int retval;
-
- if (dev->power.memalloc_noio) {
- unsigned int noio_flag;
-
- /*
- * Deadlock might be caused if memory allocation with
- * GFP_KERNEL happens inside runtime_suspend and
- * runtime_resume callbacks of one block device's
- * ancestor or the block device itself. Network
- * device might be thought as part of iSCSI block
- * device, so network device and its ancestor should
- * be marked as memalloc_noio too.
- */
- noio_flag = memalloc_noio_save();
- retval = __rpm_callback(cb, dev);
- memalloc_noio_restore(noio_flag);
- } else {
- retval = __rpm_callback(cb, dev);
- }
-
- dev->power.runtime_error = retval;
- return retval != -EACCES ? retval : -EIO;
-}
-
-/**
* rpm_suspend - Carry out runtime suspend of given device.
* @dev: Device to suspend.
* @rpmflags: Flag bits.
next prev parent reply other threads:[~2022-12-02 14:32 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-02 14:28 [PATCH v1 0/2] PM: runtime: Fix rpm_idle() and relocate rpm_callback() Rafael J. Wysocki
2022-12-02 14:30 ` [PATCH v1 1/2] PM: runtime: Do not call __rpm_callback() from rpm_idle() Rafael J. Wysocki
2022-12-05 7:45 ` Adrian Hunter
2022-12-05 14:45 ` Rafael J. Wysocki
2022-12-05 12:07 ` Ulf Hansson
2022-12-05 12:13 ` Rafael J. Wysocki
2022-12-05 12:46 ` Ulf Hansson
2022-12-05 12:51 ` Rafael J. Wysocki
2022-12-02 14:32 ` Rafael J. Wysocki [this message]
2022-12-05 8:13 ` [PATCH v1 2/2] PM: runtime: Relocate rpm_callback() right after __rpm_callback() Adrian Hunter
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