linux-kernel - [PATCH 1/2 V2] usb: gadget: s3c: Fix incorrect resources releasing

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: <20210306142108.3429-1-christophe.jaillet@wanadoo.fr>
Date:   Sat,  6 Mar 2021 15:21:08 +0100
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     balbi@...nel.org, gregkh@...uxfoundation.org, krzk@...nel.org,
        nathan@...nel.org, gustavoars@...nel.org, arnd@...db.de,
        ben-linux@...ff.org
Cc:     linux-usb@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH 1/2 V2] usb: gadget: s3c: Fix incorrect resources releasing

Since commit 188db4435ac6 ("usb: gadget: s3c: use platform resources"),
'request_mem_region()' and 'ioremap()' are no more used, so they don't need
to be undone in the error handling path of the probe and in the removre
function.

Remove these calls and the unneeded 'rsrc_start' and 'rsrc_len' global
variables.

Fixes: 188db4435ac6 ("usb: gadget: s3c: use platform resources")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
the 'err' label is used only to reduce the diff size of this patch. It is
removed in the following patch.

v2: Fix a stupid error in the hash in Fixes:
---
 drivers/usb/gadget/udc/s3c2410_udc.c | 14 +++-----------
 1 file changed, 3 insertions(+), 11 deletions(-)

diff --git a/drivers/usb/gadget/udc/s3c2410_udc.c b/drivers/usb/gadget/udc/s3c2410_udc.c
index f1ea51476add..3fc436286bad 100644
--- a/drivers/usb/gadget/udc/s3c2410_udc.c
+++ b/drivers/usb/gadget/udc/s3c2410_udc.c
@@ -54,8 +54,6 @@ static struct clk		*udc_clock;
 static struct clk		*usb_bus_clock;
 static void __iomem		*base_addr;
 static int			irq_usbd;
-static u64			rsrc_start;
-static u64			rsrc_len;
 static struct dentry		*s3c2410_udc_debugfs_root;
 
 static inline u32 udc_read(u32 reg)
@@ -1775,7 +1773,7 @@ static int s3c2410_udc_probe(struct platform_device *pdev)
 	base_addr = devm_platform_ioremap_resource(pdev, 0);
 	if (!base_addr) {
 		retval = -ENOMEM;
-		goto err_mem;
+		goto err;
 	}
 
 	the_controller = udc;
@@ -1793,7 +1791,7 @@ static int s3c2410_udc_probe(struct platform_device *pdev)
 	if (retval != 0) {
 		dev_err(dev, "cannot get irq %i, err %d\n", irq_usbd, retval);
 		retval = -EBUSY;
-		goto err_map;
+		goto err;
 	}
 
 	dev_dbg(dev, "got irq %i\n", irq_usbd);
@@ -1864,10 +1862,7 @@ static int s3c2410_udc_probe(struct platform_device *pdev)
 		gpio_free(udc_info->vbus_pin);
 err_int:
 	free_irq(irq_usbd, udc);
-err_map:
-	iounmap(base_addr);
-err_mem:
-	release_mem_region(rsrc_start, rsrc_len);
+err:
 
 	return retval;
 }
@@ -1899,9 +1894,6 @@ static int s3c2410_udc_remove(struct platform_device *pdev)
 
 	free_irq(irq_usbd, udc);
 
-	iounmap(base_addr);
-	release_mem_region(rsrc_start, rsrc_len);
-
 	if (!IS_ERR(udc_clock) && udc_clock != NULL) {
 		clk_disable_unprepare(udc_clock);
 		clk_put(udc_clock);
-- 
2.27.0