linux-kernel - [PATCH] platform/x86: wmi: replace usage of found with dedicated list iterator variable

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Date:   Thu, 24 Mar 2022 08:20:15 +0100
From:   Jakob Koschel <jakobkoschel@...il.com>
To:     Hans de Goede <hdegoede@...hat.com>
Cc:     Mark Gross <markgross@...nel.org>,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
        Mike Rapoport <rppt@...nel.org>,
        "Brian Johannesmeyer" <bjohannesmeyer@...il.com>,
        Cristiano Giuffrida <c.giuffrida@...nl>,
        "Bos, H.J." <h.j.bos@...nl>, Jakob Koschel <jakobkoschel@...il.com>
Subject: [PATCH] platform/x86: wmi: replace usage of found with dedicated list iterator variable

To move the list iterator variable into the list_for_each_entry_*()
macro in the future it should be avoided to use the list iterator
variable after the loop body.

To *never* use the list iterator variable after the loop it was
concluded to use a separate iterator variable instead of a
found boolean [1].

This removes the need to use a found variable and simply checking if
the variable was set, can determine if the break/goto was hit.

Link: https://lore.kernel.org/all/CAHk-=wgRr_D8CB-D9Kg-c=EHreAsk5SqXPwr9Y7k9sA6cWXJ6w@mail.gmail.com/
Signed-off-by: Jakob Koschel <jakobkoschel@...il.com>
---
 drivers/platform/x86/wmi.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c
index 58a23a9adbef..aed293b5af81 100644
--- a/drivers/platform/x86/wmi.c
+++ b/drivers/platform/x86/wmi.c
@@ -1308,21 +1308,20 @@ acpi_wmi_ec_space_handler(u32 function, acpi_physical_address address,
 static void acpi_wmi_notify_handler(acpi_handle handle, u32 event,
 				    void *context)
 {
-	struct wmi_block *wblock;
-	bool found_it = false;
+	struct wmi_block *wblock = NULL, *iter;
 
-	list_for_each_entry(wblock, &wmi_block_list, list) {
-		struct guid_block *block = &wblock->gblock;
+	list_for_each_entry(iter, &wmi_block_list, list) {
+		struct guid_block *block = &iter->gblock;
 
-		if (wblock->acpi_device->handle == handle &&
+		if (iter->acpi_device->handle == handle &&
 		    (block->flags & ACPI_WMI_EVENT) &&
 		    (block->notify_id == event)) {
-			found_it = true;
+			wblock = iter;
 			break;
 		}
 	}
 
-	if (!found_it)
+	if (!wblock)
 		return;
 
 	/* If a driver is bound, then notify the driver. */

base-commit: f443e374ae131c168a065ea1748feac6b2e76613
-- 
2.25.1