drm/xe/pcode: Initialize data0 for pcode read routine

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[ Upstream commit 2515d2b9ab ]

There are two registers filled in when reading data from
pcode besides the mailbox itself. Currently, we allow a NULL
value for the second of these two (data1) and assume the first
is defined. However, many of the routines that are calling
this function assume that pcode will ignore the value being
passed in and so leave that first value (data0) defined but
uninitialized. To be safe, make sure this value is always
initialized to something (0 generally) in the event pcode
behavior changes and starts using this value.

v2: Fix sob/author

Signed-off-by: Stuart Summers <stuart.summers@intel.com>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Link: https://lore.kernel.org/r/20250819201054.393220-1-stuart.summers@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Stuart Summers 2025-08-19 20:10:54 +00:00 • committed by Greg Kroah-Hartman

parent 3a0738fadf

commit e496b2cf6b

3 changed files with 10 additions and 10 deletions

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8

drivers/gpu/drm/xe/xe_device_sysfs.c

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8

drivers/gpu/drm/xe/xe_hwmon.c

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4

drivers/gpu/drm/xe/xe_vram_freq.c

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