From: "Rafael J. Wysocki" <rjw@rjwysocki.net>
To: Linux ACPI <linux-acpi@vger.kernel.org>
Cc: Linux PM <linux-pm@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Zhang Rui <rui.zhang@intel.com>,
Rajneesh Bhardwaj <rajneesh.bhardwaj@linux.intel.com>
Subject: [PATCH 3/4] ACPI: PM: s2idle: Rearrange lps0_device_attach()
Date: Fri, 26 Jul 2019 00:55:11 +0200 [thread overview]
Message-ID: <4485073.xHi3FTShEL@kreacher> (raw)
In-Reply-To: <3471485.I2vrcDHEeC@kreacher>
From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
To allow a subsequent change to be simpler, rearrange the code in
lps0_device_attach() to reduce the indentation level and (while
at it) make it avoid calling lpi_device_get_constraints() when
lps0_device_handle is not going to be set.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
drivers/acpi/sleep.c | 32 +++++++++++++++++---------------
1 file changed, 17 insertions(+), 15 deletions(-)
Index: linux-pm/drivers/acpi/sleep.c
===================================================================
--- linux-pm.orig/drivers/acpi/sleep.c
+++ linux-pm/drivers/acpi/sleep.c
@@ -916,28 +916,30 @@ static int lps0_device_attach(struct acp
guid_parse(ACPI_LPS0_DSM_UUID, &lps0_dsm_guid);
/* Check if the _DSM is present and as expected. */
out_obj = acpi_evaluate_dsm(adev->handle, &lps0_dsm_guid, 1, 0, NULL);
- if (out_obj && out_obj->type == ACPI_TYPE_BUFFER) {
- char bitmask = *(char *)out_obj->buffer.pointer;
-
- lps0_dsm_func_mask = bitmask;
- lps0_device_handle = adev->handle;
- /*
- * Use suspend-to-idle by default if the default
- * suspend mode was not set from the command line.
- */
- if (mem_sleep_default > PM_SUSPEND_MEM)
- mem_sleep_current = PM_SUSPEND_TO_IDLE;
-
- acpi_handle_debug(adev->handle, "_DSM function mask: 0x%x\n",
- bitmask);
- } else {
+ if (!out_obj || out_obj->type != ACPI_TYPE_BUFFER) {
acpi_handle_debug(adev->handle,
"_DSM function 0 evaluation failed\n");
+ return 0;
}
+
+ lps0_dsm_func_mask = *(char *)out_obj->buffer.pointer;
+
ACPI_FREE(out_obj);
+ acpi_handle_debug(adev->handle, "_DSM function mask: 0x%x\n",
+ lps0_dsm_func_mask);
+
+ lps0_device_handle = adev->handle;
+
lpi_device_get_constraints();
+ /*
+ * Use suspend-to-idle by default if the default suspend mode was not
+ * set from the command line.
+ */
+ if (mem_sleep_default > PM_SUSPEND_MEM)
+ mem_sleep_current = PM_SUSPEND_TO_IDLE;
+
return 0;
}
next prev parent reply other threads:[~2019-07-25 22:56 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-25 22:51 [PATCH 0/4] PM / ACPI: sleep: Additional changes related to suspend-to-idle Rafael J. Wysocki
2019-07-25 22:53 ` [PATCH 1/4] ACPI: PM: Set up EC GPE for system wakeup from drivers that need it Rafael J. Wysocki
2019-07-26 10:40 ` Andy Shevchenko
2019-07-25 22:54 ` [PATCH 2/4] ACPI: PM: s2idle: Execute LPS0 _DSM functions with suspended devices Rafael J. Wysocki
2019-07-25 22:55 ` Rafael J. Wysocki [this message]
2019-07-25 22:56 ` [PATCH 4/4] ACPI: PM: s2idle: Add acpi_sleep=no_lps0 command line switch Rafael J. Wysocki
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