From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Ahmad Fatoum <a.fatoum@pengutronix.de>,
"Claude Opus 4.6" <noreply@anthropic.com>
Subject: [PATCH 07/12] net: phy: add NULL check for phy driver in page accessors
Date: Mon, 16 Feb 2026 09:42:23 +0100 [thread overview]
Message-ID: <20260216084253.3547270-7-a.fatoum@pengutronix.de> (raw)
In-Reply-To: <20260216084253.3547270-1-a.fatoum@pengutronix.de>
to_phy_driver() can return NULL if the device has no driver bound.
While phy_read_page() and phy_write_page() are only called on bound
devices in practice, the existing error messages already hint at
this possibility ("PHY driver not loaded?").
Add a NULL check for phydrv before dereferencing it, consistent with
the existing error handling.
Reported-by: GCC 14.2 -fanalyzer
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
drivers/net/phy/phy-core.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/phy/phy-core.c b/drivers/net/phy/phy-core.c
index 85e8c4b3e2c7..e74ad6f3a6e6 100644
--- a/drivers/net/phy/phy-core.c
+++ b/drivers/net/phy/phy-core.c
@@ -58,7 +58,7 @@ static int phy_read_page(struct phy_device *phydev)
{
struct phy_driver *phydrv = to_phy_driver(phydev->dev.driver);
- if (!phydrv->read_page) {
+ if (!phydrv || !phydrv->read_page) {
dev_warn_once(&phydev->dev, "read_page callback not available, PHY driver not loaded?\n");
return -EOPNOTSUPP;
}
@@ -70,7 +70,7 @@ static int phy_write_page(struct phy_device *phydev, int page)
{
struct phy_driver *phydrv = to_phy_driver(phydev->dev.driver);
- if (!phydrv->write_page) {
+ if (!phydrv || !phydrv->write_page) {
dev_warn_once(&phydev->dev, "write_page callback not available, PHY driver not loaded?\n");
return -EOPNOTSUPP;
}
--
2.47.3
next prev parent reply other threads:[~2026-02-16 8:43 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-16 8:42 [PATCH 01/12] firmware: xilinx-fpga: fix double free in probe error path Ahmad Fatoum
2026-02-16 8:42 ` [PATCH 02/12] driver: fix missing va_end in dev_add_alias " Ahmad Fatoum
2026-02-16 8:42 ` [PATCH 03/12] net: eth: avoid overlapping memcpy in eth_set_ethaddr Ahmad Fatoum
2026-02-16 8:42 ` [PATCH 04/12] pmdomain: fix dereference before NULL check in genpd_get_from_provider Ahmad Fatoum
2026-02-16 8:42 ` [PATCH 05/12] bootm: android: fix PTR_ERR called after clearing error pointer Ahmad Fatoum
2026-02-16 8:42 ` [PATCH 06/12] bootm: android: fix double close of fd Ahmad Fatoum
2026-02-16 8:42 ` Ahmad Fatoum [this message]
2026-02-16 8:42 ` [PATCH 08/12] open: add missing mode argument to O_CREAT calls Ahmad Fatoum
2026-02-16 8:42 ` [PATCH 09/12] hush: add NULL check for gl_pathv after do_glob_in_argv Ahmad Fatoum
2026-02-16 8:42 ` [PATCH 10/12] i2c: rk3x: fix NULL pointer dereference on repeated NACK Ahmad Fatoum
2026-02-16 8:42 ` [PATCH 11/12] mci: imx-esdhc: remove misleading NULL check for cmd pointer Ahmad Fatoum
2026-02-16 8:42 ` [PATCH 12/12] mci: spi: initialize r1 to fix garbage return value Ahmad Fatoum
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