5.15-stable review patch. If anyone has any objections, please let me know.
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From: Christian Eggers ceggers@arri.de
commit 2c7a50bec4958f1d1c84d19cde518d0e96a676fd upstream.
Due to asynchronous driver probing there is a chance that the dummy regulator hasn't already been probed when first accessing it.
Cc: stable@vger.kernel.org Signed-off-by: Christian Eggers ceggers@arri.de Link: https://patch.msgid.link/20250313103051.32430-3-ceggers@arri.de Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/regulator/core.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-)
--- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -2047,6 +2047,10 @@ static int regulator_resolve_supply(stru
if (have_full_constraints()) { r = dummy_regulator_rdev; + if (!r) { + ret = -EPROBE_DEFER; + goto out; + } get_device(&r->dev); } else { dev_err(dev, "Failed to resolve %s-supply for %s\n", @@ -2064,6 +2068,10 @@ static int regulator_resolve_supply(stru goto out; } r = dummy_regulator_rdev; + if (!r) { + ret = -EPROBE_DEFER; + goto out; + } get_device(&r->dev); }
@@ -2172,8 +2180,10 @@ struct regulator *_regulator_get(struct * enabled, even if it isn't hooked up, and just * provide a dummy. */ - dev_warn(dev, "supply %s not found, using dummy regulator\n", id); rdev = dummy_regulator_rdev; + if (!rdev) + return ERR_PTR(-EPROBE_DEFER); + dev_warn(dev, "supply %s not found, using dummy regulator\n", id); get_device(&rdev->dev); break;