linux-kernel - [PATCH] staging: vt6656: make spin_lock

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <1398877278-2280-1-git-send-email-martink@posteo.de>
Date:	Wed, 30 Apr 2014 19:01:18 +0200
From:	Martin Kepplinger <martink@...teo.de>
To:	gregkh@...uxfoundation.org
Cc:	forest@...ttletooquiet.net, linux-kernel@...r.kernel.org,
	Martin Kepplinger <martink@...teo.de>
Subject: [PATCH] staging: vt6656: make spin_lock_irq() human readable

Don't require FIRMWAREbDownload() to, first off, unlock a held lock.
Thus do all locking in main_usb.c and hold it for a insignificantly
shorter period of time. This makes the affected area significantly more
readable though.

Signed-off-by: Martin Kepplinger <martink@...teo.de>
---
 drivers/staging/vt6656/firmware.c |    2 --
 drivers/staging/vt6656/main_usb.c |    5 ++++-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/vt6656/firmware.c b/drivers/staging/vt6656/firmware.c
index cd2ea76..79129ad 100644
--- a/drivers/staging/vt6656/firmware.c
+++ b/drivers/staging/vt6656/firmware.c
@@ -54,7 +54,6 @@ int FIRMWAREbDownload(struct vnt_private *pDevice)
 	int ii, rc;
 
 	DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"---->Download firmware\n");
-	spin_unlock_irq(&pDevice->lock);
 
 	rc = request_firmware(&fw, FIRMWARE_NAME, dev);
 	if (rc) {
@@ -91,7 +90,6 @@ free_fw:
 out:
 	kfree(pBuffer);
 
-	spin_lock_irq(&pDevice->lock);
 	return result;
 }
 MODULE_FIRMWARE(FIRMWARE_NAME);
diff --git a/drivers/staging/vt6656/main_usb.c b/drivers/staging/vt6656/main_usb.c
index 3c93230..1dc02c4 100644
--- a/drivers/staging/vt6656/main_usb.c
+++ b/drivers/staging/vt6656/main_usb.c
@@ -319,7 +319,11 @@ static int device_init_registers(struct vnt_private *pDevice)
 	memcpy(pDevice->abySNAP_Bridgetunnel, abySNAP_Bridgetunnel, ETH_ALEN);
 
 	if (!FIRMWAREbCheckVersion(pDevice)) {
+
+		spin_unlock_irq(&pDevice->lock);
 		if (FIRMWAREbDownload(pDevice) == true) {
+
+			spin_lock_irq(&pDevice->lock);
 			if (FIRMWAREbBrach2Sram(pDevice) == false) {
 				DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO
 					" FIRMWAREbBrach2Sram fail\n");
@@ -329,7 +333,6 @@ static int device_init_registers(struct vnt_private *pDevice)
 		} else {
 			DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO
 				" FIRMWAREbDownload fail\n");
-			spin_unlock_irq(&pDevice->lock);
 			return false;
 		}
 	}
-- 
1.7.10.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/