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alistair23-linux/drivers
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Ard Biesheuvel b5e3cf410b
spi/acpi: fix incorrect ACPI parent check 
The ACPI device object parsing code for SPI slaves enumerates the
entire ACPI namespace to look for devices that refer to the master
in question via the 'resource_source' field in the 'SPISerialBus'
resource. If that field does not refer to a valid ACPI device or
if it refers to the wrong SPI master, we should disregard the
device.

Current, the valid device check is wrong, since it gets the
polarity of 'status' wrong. This could cause issues if the
'resource_source' field is bogus but parent_handle happens to
refer to the correct master (which is not entirely imaginary
since this code runs in a loop)

So test for ACPI_FAILURE() instead, to make the code more
self explanatory.

Fixes: 4c3c59544f ("spi/acpi: enumerate all SPI slaves in the namespace")
Reported-by: kbuild test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: andy.shevchenko@gmail.com
Cc: masahisa.kojima@linaro.org
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Cc: linux-acpi@vger.kernel.org
Cc: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-06-19 11:54:29 +01:00
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block xen: fix for 5.2-rc4 2019-06-08 13:16:05 -07:00
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dma SPDX update for 5.2-rc4 2019-06-08 12:52:42 -07:00
dma-buf SPDX update for 5.2-rc4 2019-06-08 12:52:42 -07:00
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gpu SPDX update for 5.2-rc4 2019-06-08 12:52:42 -07:00
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hwmon SPDX update for 5.2-rc4 2019-06-08 12:52:42 -07:00
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i2c SPDX update for 5.2-rc4 2019-06-08 12:52:42 -07:00
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infiniband SPDX update for 5.2-rc4 2019-06-08 12:52:42 -07:00
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isdn SPDX update for 5.2-rc3, round 1 2019-05-31 08:34:32 -07:00
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memstick memstick: mspro_block: Fix an error code in mspro_block_issue_req() 2019-05-28 09:53:54 +02:00
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misc SPDX update for 5.2-rc4 2019-06-08 12:52:42 -07:00
mmc SPDX update for 5.2-rc4 2019-06-08 12:52:42 -07:00
mtd treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
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net SPDX update for 5.2-rc4 2019-06-08 12:52:42 -07:00
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nvme Merge branch 'nvme-5.2-rc-next' of git://git.infradead.org/nvme into for-linus 2019-06-07 14:04:28 -06:00
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parisc SPDX update for 5.2-rc4 2019-06-08 12:52:42 -07:00
parport Char/Misc driver fixes for 5.2-rc4 2019-06-08 12:50:36 -07:00
pci PCI: PM: Avoid possible suspend-to-idle issue 2019-05-27 10:55:08 +02:00
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s390 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-06-07 09:29:14 -07:00
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spi spi/acpi: fix incorrect ACPI parent check 2019-06-19 11:54:29 +01:00
spmi treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284 2019-06-05 17:36:37 +02:00
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staging Staging/IIO driver fixes for 5.2-rc3 2019-05-31 08:31:45 -07:00
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tty vt/fbcon: deinitialize resources in visual_init() after failed memory allocation 2019-05-24 17:08:18 +02:00
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usb usbip: usbip_host: fix stub_dev lock context imbalance regression 2019-05-29 13:26:32 -07:00
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virtio virtio: Fix indentation of VIRTIO_MMIO 2019-05-27 11:08:22 -04:00
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