[PATCH] net: mvpp2: ptp: Fix unused variables

[PATCH] net: mvpp2: ptp: Fix unused variables

[Alex Dewar]

In the functions mvpp2_isr_handle_xlg() and
mvpp2_isr_handle_gmac_internal(), the bool variable link is assigned a
true value in the case that a given bit of val is set. However, if the
bit is unset, no value is assigned to link and it is then passed to
mvpp2_isr_handle_link() without being initialised. Fix by assigning to
link the value of the bit test.

Build-tested on x86.

Fixes: 36cfd3a6e52b ("net: mvpp2: restructure "link status" interrupt handling")
Signed-off-by: Alex Dewar <alex.dewar90@gmail.com>
---
 drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index 7d86940747d1..87b1c9cfdc77 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -3070,8 +3070,7 @@ static void mvpp2_isr_handle_xlg(struct mvpp2_port *port)
 	val = readl(port->base + MVPP22_XLG_INT_STAT);
 	if (val & MVPP22_XLG_INT_STAT_LINK) {
 		val = readl(port->base + MVPP22_XLG_STATUS);
-		if (val & MVPP22_XLG_STATUS_LINK_UP)
-			link = true;
+		link = (val & MVPP22_XLG_STATUS_LINK_UP);
 		mvpp2_isr_handle_link(port, link);
 	}
 }
@@ -3087,8 +3086,7 @@ static void mvpp2_isr_handle_gmac_internal(struct mvpp2_port *port)
 		val = readl(port->base + MVPP22_GMAC_INT_STAT);
 		if (val & MVPP22_GMAC_INT_STAT_LINK) {
 			val = readl(port->base + MVPP2_GMAC_STATUS0);
-			if (val & MVPP2_GMAC_STATUS0_LINK_UP)
-				link = true;
+			link = (val & MVPP2_GMAC_STATUS0_LINK_UP);
 			mvpp2_isr_handle_link(port, link);
 		}
 	}
-- 
2.28.0

Re: [PATCH] net: mvpp2: ptp: Fix unused variables

[David Miller]

From: Alex Dewar <alex.dewar90@gmail.com>
Date: Thu, 10 Sep 2020 14:49:10 +0100

> In the functions mvpp2_isr_handle_xlg() and
> mvpp2_isr_handle_gmac_internal(), the bool variable link is assigned a
> true value in the case that a given bit of val is set. However, if the
> bit is unset, no value is assigned to link and it is then passed to
> mvpp2_isr_handle_link() without being initialised. Fix by assigning to
> link the value of the bit test.
> 
> Build-tested on x86.
> 
> Fixes: 36cfd3a6e52b ("net: mvpp2: restructure "link status" interrupt handling")
> Signed-off-by: Alex Dewar <alex.dewar90@gmail.com>

Applied to net-next.