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[ Upstream commit 1198d2316dc4265a97d0e8445a22c7a6d17580a4 ]
Currently, these options cause the following libkmod error:
libkmod: ERROR ../libkmod/libkmod-config.c:489 kcmdline_parse_result: \
Ignoring bad option on kernel command line while parsing module \
name: 'ivrs_xxxx[XX:XX'
Fix by introducing a new parameter format for these options and
throw a warning for the deprecated format.
Users are still allowed to omit the PCI Segment if zero.
Adding a Link: to the reason why we're modding the syntax parsing
in the driver and not in libkmod.
Fixes: ca3bf5d47cec ("iommu/amd: Introduces ivrs_acpihid kernel parameter")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/linux-modules/20200310082308.14318-2-lucas.demarchi@intel.com/
Reported-by: Kim Phillips <kim.phillips@amd.com>
Co-developed-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Kim Phillips <kim.phillips@amd.com>
Link: https://lore.kernel.org/r/20220919155638.391481-2-kim.phillips@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Stable-dep-of: b6b26d86c61c ("iommu/amd: Add a length limitation for the ivrs_acpihid command-line parameter")
Signed-off-by: Sasha Levin <sashal@kernel.org>
774c63f536
