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Dan Carpenter 50fd584fbb firmware: arm_scpi: Prevent the ternary sign expansion bug 
[ Upstream commit d9cd78edb2e6b7e26747c0ec312be31e7ef196fe ]

How the type promotion works in ternary expressions is a bit tricky.
The problem is that scpi_clk_get_val() returns longs, "ret" is a int
which holds a negative error code, and le32_to_cpu() is an unsigned int.
We want the negative error code to be cast to a negative long.  But
because le32_to_cpu() is an u32 then "ret" is type promoted to u32 and
becomes a high positive and then it is promoted to long and it is still
a high positive value.

Fix this by getting rid of the ternary.

Link: https://lore.kernel.org/r/YIE7pdqV/h10tEAK@mwanda
Fixes: 8cb7cf56c9 ("firmware: add support for ARM System Control and Power Interface(SCPI) protocol")
Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
[sudeep.holla: changed to return 0 as clock rate on error]
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-05-26 12:05:14 +02:00
arch tweewide: Fix most Shebang lines 2021-05-22 11:38:30 +02:00
block blk-mq: Swap two calls in blk_mq_exit_queue() 2021-05-19 10:08:30 +02:00
certs
crypto
Documentation tweewide: Fix most Shebang lines 2021-05-22 11:38:30 +02:00
drivers firmware: arm_scpi: Prevent the ternary sign expansion bug 2021-05-26 12:05:14 +02:00
fs block: reexpand iov_iter after read/write 2021-05-22 11:38:29 +02:00
include virtio_net: Do not pull payload in skb->head 2021-05-22 11:38:28 +02:00
init
ipc
kernel kernel: kexec_file: fix error return code of kexec_calculate_store_digests() 2021-05-19 10:08:28 +02:00
lib lib: stackdepot: turn depot_lock spinlock to raw_spinlock 2021-05-22 11:38:30 +02:00
LICENSES
mm mm/hugetlb: fix F_SEAL_FUTURE_WRITE 2021-05-19 10:08:29 +02:00
net ipv6: remove extra dev_hold() for fallback tunnels 2021-05-22 11:38:30 +02:00
samples
scripts scripts: switch explicitly to Python 3 2021-05-22 11:38:30 +02:00
security
sound ALSA: hda: generic: change the DAC ctl name for LO+SPK or LO+HP 2021-05-22 11:38:29 +02:00
tools tweewide: Fix most Shebang lines 2021-05-22 11:38:30 +02:00
usr
virt KVM: arm64: Initialize VCPU mdcr_el2 before loading it 2021-05-22 11:38:30 +02:00
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Makefile Linux 5.4.121 2021-05-22 11:38:30 +02:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.