From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Ahmad Fatoum <a.fatoum@pengutronix.de>
Subject: [PATCH 08/12] USB: musb: remove dead stores
Date: Wed, 30 Sep 2020 09:20:01 +0200 [thread overview]
Message-ID: <20200930072005.1407-8-a.fatoum@pengutronix.de> (raw)
In-Reply-To: <20200930072005.1407-1-a.fatoum@pengutronix.de>
Reading the interrupt registers has a side-effect, so their value need
not be used for anythig. Storing it into a variable never read
obfuscates this however. Cast to (void) for clarity.
Reported-by: clang-analyzer-10
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
drivers/usb/musb/musb_core.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 9fdef8679b88..266663a9b0ec 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -330,7 +330,6 @@ void musb_load_testpacket(struct musb *musb)
static void musb_generic_disable(struct musb *musb)
{
void __iomem *mbase = musb->mregs;
- u16 temp;
/* disable interrupts */
musb_writeb(mbase, MUSB_INTRUSBE, 0);
@@ -343,9 +342,9 @@ static void musb_generic_disable(struct musb *musb)
musb_writeb(mbase, MUSB_DEVCTL, 0);
/* flush pending interrupts */
- temp = musb_readb(mbase, MUSB_INTRUSB);
- temp = musb_readw(mbase, MUSB_INTRTX);
- temp = musb_readw(mbase, MUSB_INTRRX);
+ (void)musb_readb(mbase, MUSB_INTRUSB);
+ (void)musb_readw(mbase, MUSB_INTRTX);
+ (void)musb_readw(mbase, MUSB_INTRRX);
}
--
2.28.0
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next prev parent reply other threads:[~2020-09-30 7:20 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-30 7:19 [PATCH 01/12] hw_random: mxc-rngc: fix read of uninitialized variable Ahmad Fatoum
2020-09-30 7:19 ` [PATCH 02/12] globalvar: fix uninitialized read of variable when no nvvars exist Ahmad Fatoum
2020-09-30 7:19 ` [PATCH 03/12] commands: uimage: fix indeterminate exit code of command Ahmad Fatoum
2020-09-30 7:19 ` [PATCH 04/12] watchdog: fix division-by-zero when clock rate == 0 Ahmad Fatoum
2020-09-30 7:19 ` [PATCH 05/12] net: usb: asix: propagate errors from MDIO accessors Ahmad Fatoum
2020-09-30 7:24 ` [PATCH] fixup! " Ahmad Fatoum
2020-10-02 4:04 ` Sascha Hauer
2020-09-30 7:19 ` [PATCH 06/12] digest: sha: remove no-op "erase" of automatic variables Ahmad Fatoum
2020-09-30 7:20 ` [PATCH 07/12] common: memsize: eliminate dead store Ahmad Fatoum
2020-09-30 7:20 ` Ahmad Fatoum [this message]
2020-09-30 7:20 ` [PATCH 09/12] fs: squashfs: remove dead stores for xattr_id Ahmad Fatoum
2020-09-30 7:20 ` [PATCH 10/12] reset: remove dead initialization Ahmad Fatoum
2020-09-30 7:20 ` [PATCH 11/12] sandbox: fix behavior with images >= 4G on 32-bit Ahmad Fatoum
2020-09-30 7:20 ` [PATCH 12/12] blspec: fix dead assignment Ahmad Fatoum
2020-10-02 4:04 ` [PATCH 01/12] hw_random: mxc-rngc: fix read of uninitialized variable Sascha Hauer
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