From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Aaro Koskinen <aaro.koskinen@nokia.com>,
Mark Brown <broonie@kernel.org>, Sasha Levin <sashal@kernel.org>,
linux-spi@vger.kernel.org
Subject: [PATCH AUTOSEL 5.5 30/41] spi: spi_register_controller(): free bus id on error paths
Date: Sun, 15 Mar 2020 22:33:08 -0400 [thread overview]
Message-ID: <20200316023319.749-30-sashal@kernel.org> (raw)
In-Reply-To: <20200316023319.749-1-sashal@kernel.org>
From: Aaro Koskinen <aaro.koskinen@nokia.com>
[ Upstream commit f9981d4f50b475d7dbb70f3022b87a3c8bba9fd6 ]
Some error paths leave the bus id allocated. As a result the IDR
allocation will fail after a deferred probe. Fix by freeing the bus id
always on error.
Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Message-Id: <20200304111740.27915-1-aaro.koskinen@nokia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/spi/spi.c | 32 +++++++++++++++-----------------
1 file changed, 15 insertions(+), 17 deletions(-)
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 8994545367a2d..0e70af2677fee 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -2615,7 +2615,7 @@ int spi_register_controller(struct spi_controller *ctlr)
if (ctlr->use_gpio_descriptors) {
status = spi_get_gpio_descs(ctlr);
if (status)
- return status;
+ goto free_bus_id;
/*
* A controller using GPIO descriptors always
* supports SPI_CS_HIGH if need be.
@@ -2625,7 +2625,7 @@ int spi_register_controller(struct spi_controller *ctlr)
/* Legacy code path for GPIOs from DT */
status = of_spi_get_gpio_numbers(ctlr);
if (status)
- return status;
+ goto free_bus_id;
}
}
@@ -2633,17 +2633,14 @@ int spi_register_controller(struct spi_controller *ctlr)
* Even if it's just one always-selected device, there must
* be at least one chipselect.
*/
- if (!ctlr->num_chipselect)
- return -EINVAL;
+ if (!ctlr->num_chipselect) {
+ status = -EINVAL;
+ goto free_bus_id;
+ }
status = device_add(&ctlr->dev);
- if (status < 0) {
- /* free bus id */
- mutex_lock(&board_lock);
- idr_remove(&spi_master_idr, ctlr->bus_num);
- mutex_unlock(&board_lock);
- goto done;
- }
+ if (status < 0)
+ goto free_bus_id;
dev_dbg(dev, "registered %s %s\n",
spi_controller_is_slave(ctlr) ? "slave" : "master",
dev_name(&ctlr->dev));
@@ -2659,11 +2656,7 @@ int spi_register_controller(struct spi_controller *ctlr)
status = spi_controller_initialize_queue(ctlr);
if (status) {
device_del(&ctlr->dev);
- /* free bus id */
- mutex_lock(&board_lock);
- idr_remove(&spi_master_idr, ctlr->bus_num);
- mutex_unlock(&board_lock);
- goto done;
+ goto free_bus_id;
}
}
/* add statistics */
@@ -2678,7 +2671,12 @@ int spi_register_controller(struct spi_controller *ctlr)
/* Register devices from the device tree and ACPI */
of_register_spi_devices(ctlr);
acpi_register_spi_devices(ctlr);
-done:
+ return status;
+
+free_bus_id:
+ mutex_lock(&board_lock);
+ idr_remove(&spi_master_idr, ctlr->bus_num);
+ mutex_unlock(&board_lock);
return status;
}
EXPORT_SYMBOL_GPL(spi_register_controller);
--
2.20.1
next prev parent reply other threads:[~2020-03-16 2:34 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-16 2:32 [PATCH AUTOSEL 5.5 01/41] spi: spi-omap2-mcspi: Handle DMA size restriction on AM65x Sasha Levin
2020-03-16 2:32 ` [PATCH AUTOSEL 5.5 02/41] spi: spi-omap2-mcspi: Support probe deferral for DMA channels Sasha Levin
2020-03-16 2:32 ` [PATCH AUTOSEL 5.5 03/41] drm/mediatek: Find the cursor plane instead of hard coding it Sasha Levin
2020-03-16 2:32 ` [PATCH AUTOSEL 5.5 04/41] drm/mediatek: Ensure the cursor plane is on top of other overlays Sasha Levin
2020-03-16 2:32 ` [PATCH AUTOSEL 5.5 05/41] ARM: dts: imx6dl-colibri-eval-v3: fix sram compatible properties Sasha Levin
2020-03-16 7:21 ` Johan Hovold
2020-03-22 12:54 ` Sasha Levin
2020-03-16 2:32 ` [PATCH AUTOSEL 5.5 06/41] phy: ti: gmii-sel: fix set of copy-paste errors Sasha Levin
2020-03-16 2:32 ` [PATCH AUTOSEL 5.5 07/41] phy: ti: gmii-sel: do not fail in case of gmii Sasha Levin
2020-03-16 2:32 ` [PATCH AUTOSEL 5.5 08/41] ARM: dts: dra7-l4: mark timer13-16 as pwm capable Sasha Levin
2020-03-16 2:32 ` [PATCH AUTOSEL 5.5 09/41] ASoC: meson: g12a: add tohdmitx reset Sasha Levin
2020-03-16 2:32 ` [PATCH AUTOSEL 5.5 10/41] spi: qup: call spi_qup_pm_resume_runtime before suspending Sasha Levin
2020-03-16 2:32 ` [PATCH AUTOSEL 5.5 11/41] powerpc: Include .BTF section Sasha Levin
2020-03-16 2:32 ` [PATCH AUTOSEL 5.5 12/41] cifs: fix potential mismatch of UNC paths Sasha Levin
2020-03-16 2:32 ` [PATCH AUTOSEL 5.5 13/41] cifs: add missing mount option to /proc/mounts Sasha Levin
2020-03-16 2:32 ` [PATCH AUTOSEL 5.5 14/41] ARM: dts: dra7: Add "dma-ranges" property to PCIe RC DT nodes Sasha Levin
2020-03-16 2:32 ` [PATCH AUTOSEL 5.5 15/41] spi: pxa2xx: Add CS control clock quirk Sasha Levin
2020-03-16 2:32 ` [PATCH AUTOSEL 5.5 16/41] spi/zynqmp: remove entry that causes a cs glitch Sasha Levin
2020-03-16 2:32 ` [PATCH AUTOSEL 5.5 17/41] ARM: dts: bcm283x: Add missing properties to the PWR LED Sasha Levin
2020-03-16 2:32 ` [PATCH AUTOSEL 5.5 18/41] drm/exynos: dsi: propagate error value and silence meaningless warning Sasha Levin
2020-03-16 2:32 ` [PATCH AUTOSEL 5.5 19/41] drm/exynos: dsi: fix workaround for the legacy clock name Sasha Levin
2020-03-16 2:32 ` [PATCH AUTOSEL 5.5 20/41] drm/exynos: hdmi: don't leak enable HDMI_EN regulator if probe fails Sasha Levin
2020-03-16 2:32 ` [PATCH AUTOSEL 5.5 21/41] drivers/perf: fsl_imx8_ddr: Correct the CLEAR bit definition Sasha Levin
2020-03-16 2:33 ` [PATCH AUTOSEL 5.5 22/41] drivers/perf: arm_pmu_acpi: Fix incorrect checking of gicc pointer Sasha Levin
2020-03-16 2:33 ` [PATCH AUTOSEL 5.5 23/41] io-wq: fix IO_WQ_WORK_NO_CANCEL cancellation Sasha Levin
2020-03-16 2:33 ` [PATCH AUTOSEL 5.5 24/41] ARM: bcm2835_defconfig: Explicitly restore CONFIG_DEBUG_FS Sasha Levin
2020-03-16 2:33 ` [PATCH AUTOSEL 5.5 25/41] altera-stapl: altera_get_note: prevent write beyond end of 'key' Sasha Levin
2020-03-16 2:33 ` [PATCH AUTOSEL 5.5 26/41] dm bio record: save/restore bi_end_io and bi_integrity Sasha Levin
2020-03-16 2:33 ` [PATCH AUTOSEL 5.5 27/41] dm integrity: use dm_bio_record and dm_bio_restore Sasha Levin
2020-03-16 2:33 ` [PATCH AUTOSEL 5.5 28/41] riscv: avoid the PIC offset of static percpu data in module beyond 2G limits Sasha Levin
2020-03-16 2:33 ` [PATCH AUTOSEL 5.5 29/41] ASoC: stm32: sai: manage rebind issue Sasha Levin
2020-03-16 2:33 ` Sasha Levin [this message]
2020-03-16 2:33 ` [PATCH AUTOSEL 5.5 31/41] riscv: Force flat memory model with no-mmu Sasha Levin
2020-03-16 2:33 ` [PATCH AUTOSEL 5.5 32/41] riscv: Fix range looking for kernel image memblock Sasha Levin
2020-03-16 2:33 ` [PATCH AUTOSEL 5.5 33/41] drm/amdgpu: clean wptr on wb when gpu recovery Sasha Levin
2020-03-16 2:33 ` [PATCH AUTOSEL 5.5 34/41] drm/amd/display: Clear link settings on MST disable connector Sasha Levin
2020-03-16 2:33 ` [PATCH AUTOSEL 5.5 35/41] drm/amd/display: fix dcc swath size calculations on dcn1 Sasha Levin
2020-03-16 2:33 ` [PATCH AUTOSEL 5.5 36/41] xenbus: req->body should be updated before req->state Sasha Levin
2020-03-16 2:33 ` [PATCH AUTOSEL 5.5 37/41] xenbus: req->err " Sasha Levin
2020-03-16 2:33 ` [PATCH AUTOSEL 5.5 38/41] riscv: fix seccomp reject syscall code path Sasha Levin
2020-03-16 2:33 ` [PATCH AUTOSEL 5.5 39/41] block, bfq: fix overwrite of bfq_group pointer in bfq_find_set_group() Sasha Levin
2020-03-16 2:33 ` [PATCH AUTOSEL 5.5 40/41] parse-maintainers: Mark as executable Sasha Levin
2020-03-16 2:33 ` [PATCH AUTOSEL 5.5 41/41] io_uring: fix lockup with timeouts Sasha Levin
2020-03-16 11:50 ` [PATCH AUTOSEL 5.5 01/41] spi: spi-omap2-mcspi: Handle DMA size restriction on AM65x Mark Brown
2020-03-22 19:37 ` Sasha Levin
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