netdev - [PATCH net-next 13/24] can: kvaser_pciefd: Skip redundant NULL pointer check in ISR

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

Date: Fri, 21 Jun 2024 09:48:33 +0200
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net,
	kuba@...nel.org,
	linux-can@...r.kernel.org,
	kernel@...gutronix.de,
	Martin Jocic <martin.jocic@...ser.com>,
	Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH net-next 13/24] can: kvaser_pciefd: Skip redundant NULL pointer check in ISR

From: Martin Jocic <martin.jocic@...ser.com>

This check is already done at the creation of the net devices in
kvaser_pciefd_setup_can_ctrls called from kvaser_pciefd_probe.

If it fails, the driver won't load, so there should be no need to
repeat the check inside the ISR. The number of channels is read
from the FPGA and should be trusted.

Signed-off-by: Martin Jocic <martin.jocic@...ser.com>
Link: https://lore.kernel.org/all/20240614151524.2718287-3-martin.jocic@kvaser.com
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
 drivers/net/can/kvaser_pciefd.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/drivers/net/can/kvaser_pciefd.c b/drivers/net/can/kvaser_pciefd.c
index fa205091aafe..4832a93d34de 100644
--- a/drivers/net/can/kvaser_pciefd.c
+++ b/drivers/net/can/kvaser_pciefd.c
@@ -1701,12 +1701,6 @@ static irqreturn_t kvaser_pciefd_irq_handler(int irq, void *dev)
 		kvaser_pciefd_receive_irq(pcie);
 
 	for (i = 0; i < pcie->nr_channels; i++) {
-		if (!pcie->can[i]) {
-			dev_err(&pcie->pci->dev,
-				"IRQ mask points to unallocated controller\n");
-			break;
-		}
-
 		/* Check that mask matches channel (i) IRQ mask */
 		if (board_irq & irq_mask->kcan_tx[i])
 			kvaser_pciefd_transmit_irq(pcie->can[i]);
-- 
2.43.0