From: Amol Lad <amol@verismonetworks.com>
Date: Fri, 8 Dec 2006 10:40:06 +0000 (-0800)
Subject: [PATCH] ioremap balanced with iounmap for drivers/video/pvr2fb
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=295a1b476749e8b6fa6c3c0978426360ac7dde4b;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

[PATCH] ioremap balanced with iounmap for drivers/video/pvr2fb

ioremap must be balanced by an iounmap and failing to do so can result in a
memory leak.

Signed-off-by: Amol Lad <amol@verismonetworks.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/drivers/video/pvr2fb.c b/drivers/video/pvr2fb.c
index c7bc80921f16..a93618bc9d27 100644
--- a/drivers/video/pvr2fb.c
+++ b/drivers/video/pvr2fb.c
@@ -905,6 +905,15 @@ static int __init pvr2fb_dc_init(void)
 
 static void pvr2fb_dc_exit(void)
 {
+	if (fb_info->screen_base) {
+		iounmap(fb_info->screen_base);
+		fb_info->screen_base = NULL;
+	}
+	if (currentpar->mmio_base) {
+		iounmap((void *)currentpar->mmio_base);
+		currentpar->mmio_base = 0;
+	}
+
 	free_irq(HW_EVENT_VSYNC, 0);
 #ifdef CONFIG_SH_DMA
 	free_dma(pvr2dma);
@@ -946,6 +955,15 @@ static int __devinit pvr2fb_pci_probe(struct pci_dev *pdev,
 
 static void __devexit pvr2fb_pci_remove(struct pci_dev *pdev)
 {
+	if (fb_info->screen_base) {
+		iounmap(fb_info->screen_base);
+		fb_info->screen_base = NULL;
+	}
+	if (currentpar->mmio_base) {
+		iounmap((void *)currentpar->mmio_base);
+		currentpar->mmio_base = 0;
+	}
+
 	pci_release_regions(pdev);
 }