diff mbox series

[net,v2] net: dsa: microchip: Fix Wake-on-LAN check to not return an error

Message ID 20240805235200.24982-1-Tristram.Ha@microchip.com (mailing list archive)
State Accepted
Commit c7a19018bd557c24072b59088ad2684fd83ea3f4
Delegated to: Netdev Maintainers
Headers show
Series [net,v2] net: dsa: microchip: Fix Wake-on-LAN check to not return an error | expand

Checks

Context Check Description
netdev/series_format success Single patches do not need cover letters
netdev/tree_selection success Clearly marked for net
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag present in non-next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 29 this patch: 29
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 10 of 10 maintainers
netdev/build_clang success Errors and warnings before: 29 this patch: 29
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success Fixes tag looks correct
netdev/build_allmodconfig_warn success Errors and warnings before: 29 this patch: 29
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 11 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2024-08-06--15-00 (tests: 707)

Commit Message

Tristram.Ha@microchip.com Aug. 5, 2024, 11:52 p.m. UTC 
From: Tristram Ha <tristram.ha@microchip.com>

The wol variable in ksz_port_set_mac_address() is declared with random
data, but the code in ksz_get_wol call may not be executed so the
WAKE_MAGIC check may be invalid resulting in an error message when
setting a MAC address after starting the DSA driver.

Fixes: 3b454b6390c3 ("net: dsa: microchip: ksz9477: Add Wake on Magic Packet support")
Signed-off-by: Tristram Ha <tristram.ha@microchip.com>
Reviewed-by: Oleksij Rempel <o.rempel@pengutronix.de>
---
v2
- Update with Oleksij's suggestion

 drivers/net/dsa/microchip/ksz_common.c | 5 +++++
 1 file changed, 5 insertions(+)

Comments

Florian Fainelli Aug. 5, 2024, 11:54 p.m. UTC | #1 
On 8/5/24 16:52, Tristram.Ha@microchip.com wrote:
> From: Tristram Ha <tristram.ha@microchip.com>
> 
> The wol variable in ksz_port_set_mac_address() is declared with random
> data, but the code in ksz_get_wol call may not be executed so the
> WAKE_MAGIC check may be invalid resulting in an error message when
> setting a MAC address after starting the DSA driver.
> 
> Fixes: 3b454b6390c3 ("net: dsa: microchip: ksz9477: Add Wake on Magic Packet support")
> Signed-off-by: Tristram Ha <tristram.ha@microchip.com>
> Reviewed-by: Oleksij Rempel <o.rempel@pengutronix.de>

Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
patchwork-bot+netdevbpf@kernel.org Aug. 7, 2024, 2:40 a.m. UTC | #2 
Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@kernel.org>:

On Mon, 5 Aug 2024 16:52:00 -0700 you wrote:
> From: Tristram Ha <tristram.ha@microchip.com>
> 
> The wol variable in ksz_port_set_mac_address() is declared with random
> data, but the code in ksz_get_wol call may not be executed so the
> WAKE_MAGIC check may be invalid resulting in an error message when
> setting a MAC address after starting the DSA driver.
> 
> [...]

Here is the summary with links:
  - [net,v2] net: dsa: microchip: Fix Wake-on-LAN check to not return an error
    https://git.kernel.org/netdev/net/c/c7a19018bd55

You are awesome, thank you!
diff mbox series

Patch

diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index b074b4bb0629..b120e66d5669 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -3764,6 +3764,11 @@  static int ksz_port_set_mac_address(struct dsa_switch *ds, int port,
 		return -EBUSY;
 	}
 
+	/* Need to initialize variable as the code to fill in settings may
+	 * not be executed.
+	 */
+	wol.wolopts = 0;
+
 	ksz_get_wol(ds, dp->index, &wol);
 	if (wol.wolopts & WAKE_MAGIC) {
 		dev_err(ds->dev,