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79cb2cb8d8
SDI is enabled for most of the Qualcomm SoCs and as per commitff4aa3bc98("firmware: qcom_scm: disable SDI if required") it was recommended to disable SDI by mentioning it in device tree to avoid hang during watchdog or during reboot. However, for some cases if download mode tcsr register already configured from boot firmware to collect dumps and if SDI is disabled via means of mentioning it in device tree we could still end up with dump collection. Disabling SDI alone is not completely enough to disable dump mode and we also need to zero out the bits download bits from tcsr register. Current commit now, unconditionally call qcom_scm_set_download_mode() based on download_mode flag, at max if TCSR register is not mentioned or available for a SoC it will fallback to legacy way of setting download mode through command which may be no-ops or return error in case current firmware does not implements QCOM_SCM_INFO_IS_CALL_AVAIL so, at worst it does nothing if it fails. It also does to call SDI disable call if dload mode is disabled, which looks fine to do as intention is to disable dump collection even if system crashes. Fixes:ff4aa3bc98("firmware: qcom_scm: disable SDI if required") Signed-off-by: Mukesh Ojha <quic_mojha@quicinc.com> Link: https://lore.kernel.org/r/20240708155332.4056479-1-quic_mojha@quicinc.com Signed-off-by: Bjorn Andersson <andersson@kernel.org>
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 reStructuredText 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.