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Igor Putko
33da57cc4a
nvec_power_probe() calls devm_kzalloc() with GFP_NOWAIT, which disables direct reclaim and is meant for atomic context. probe() runs in normal process context and may sleep, so this needlessly risks a spurious -ENOMEM under memory pressure instead of just waiting for reclaim like every other probe() allocation does. nvec.c's own tegra_nvec_probe() already uses GFP_KERNEL for the identical pattern, confirming this is an oversight, not intentional. Signed-off-by: Igor Putko <igorpetindev@gmail.com> Acked-by: Marc Dietrich <marvin24@gmx.de> Link: https://patch.msgid.link/20260710150113.3041-1-igorpetindev@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
NVEC: An NVidia compliant Embedded Controller Protocol Implementation This is an implementation of the NVEC protocol used to communicate with an embedded controller (EC) via I2C bus. The EC is an I2C master while the host processor is the I2C slave. Requests from the host processor to the EC are started by triggering a gpio line. There is no written documentation of the protocol available to the public, but the source code[1] of the published nvec reference drivers can be a guide. This driver is currently only used by the AC100 project[2], but it is likely, that other Tegra boards (not yet mainlined, if ever) also use it. [1] e.g. https://nv-tegra.nvidia.com/gitweb/?p=linux-2.6.git;a=tree;f=arch/arm/mach-tegra/nvec;hb=android-tegra-2.6.32 [2] http://gitorious.org/ac100, http://launchpad.net/ac100