linux-kernel - [PATCH 5.18 0266/1095] spi: Return deferred probe error when controller isnt yet available

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Message-Id: <20220815180440.746497365@linuxfoundation.org>
Date:   Mon, 15 Aug 2022 19:54:25 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.18 0266/1095] spi: Return deferred probe error when controller isnt yet available

From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

[ Upstream commit 9c22ec4ac27bcc5a54dd406da168f403327a5b55 ]

If the controller is not available, it might be in the future and
we would like to re-probe the peripheral again. For that purpose
return deferred probe.

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=215993
Fixes: 87e59b36e5e2 ("spi: Support selection of the index of the ACPI Spi Resource before alloc")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Link: https://lore.kernel.org/r/20220709212956.25530-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/spi/spi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 2e6d6bbeb784..e1065768c537 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -2416,7 +2416,7 @@ static int acpi_spi_add_resource(struct acpi_resource *ares, void *data)
 
 				ctlr = acpi_spi_find_controller_by_adev(adev);
 				if (!ctlr)
-					return -ENODEV;
+					return -EPROBE_DEFER;
 
 				lookup->ctlr = ctlr;
 			}
-- 
2.35.1