diff options
| author | Ralf Ramsauer <ralf@ramses-pyramidenbau.de> | 2016-10-17 15:59:56 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-11-10 16:38:45 +0100 |
| commit | a639266ae0c343467eafe7f1467d79dd9157b2e7 (patch) | |
| tree | 3a88aecc7459f953da376b898c6bce5e89d885f1 | |
| parent | d6634d8711996c6bdb34a3235d1c4a3389529896 (diff) | |
spi: mark device nodes only in case of successful instantiation
commit e0af98a7e025a7263ae7e50264f6f79ed29642a7 upstream.
Instantiated SPI device nodes are marked with OF_POPULATE. This was
introduced in bd6c164. On unloading, loaded device nodes will of course
be unmarked. The problem are nodes that fail during initialisation: If a
node fails, it won't be unloaded and hence not be unmarked.
If a SPI driver module is unloaded and reloaded, it will skip nodes that
failed before.
Skip device nodes that are already populated and mark them only in case
of success.
Note that the same issue exists for I2C.
Fixes: bd6c164 ("spi: Mark instantiated device nodes with OF_POPULATE")
Signed-off-by: Ralf Ramsauer <ralf@ramses-pyramidenbau.de>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/spi/spi.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 200ca228d885..935f1a511856 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -1607,9 +1607,11 @@ static void of_register_spi_devices(struct spi_master *master) if (of_node_test_and_set_flag(nc, OF_POPULATED)) continue; spi = of_register_spi_device(master, nc); - if (IS_ERR(spi)) + if (IS_ERR(spi)) { dev_warn(&master->dev, "Failed to create SPI device for %s\n", nc->full_name); + of_node_clear_flag(nc, OF_POPULATED); + } } } #else @@ -3120,6 +3122,7 @@ static int of_spi_notify(struct notifier_block *nb, unsigned long action, if (IS_ERR(spi)) { pr_err("%s: failed to create for '%s'\n", __func__, rd->dn->full_name); + of_node_clear_flag(rd->dn, OF_POPULATED); return notifier_from_errno(PTR_ERR(spi)); } break; |