kernel/linux.git/drivers/mtd/devices, branch v6.19.11

mtd: intel-dg: Fix accessing regions before setting nregions

2026-02-26T23:01:16+00:00

[ Upstream commit 779c59274d03cc5c07237a2c845dfb71cff77705 ] The regions array is counted by nregions, but it's set only after accessing it: [] UBSAN: array-index-out-of-bounds in drivers/mtd/devices/mtd_intel_dg.c:750:15 [] index 0 is out of range for type ' [*]' Fix it by also fixing an undesired behavior: the loop silently ignores ENOMEM and continues setting the other entries. CC: Gustavo A. R. Silva CC: Raag Jadav Reported-by: Jani Partanen Closes: https://lore.kernel.org/all/caca6c67-4f1d-49f1-948f-e63b6b937b29@sotapeli.fi Fixes: ceb5ab3cb646 ("mtd: add driver for intel graphics non-volatile memory device") Signed-off-by: Lucas De Marchi Signed-off-by: Alexander Usyskin Reviewed-by: Raag Jadav Signed-off-by: Miquel Raynal Signed-off-by: Sasha Levin

mtd: docg3: fix kernel-doc warnings

2025-11-29T12:49:58+00:00

Fix kernel-doc warnings in docg3.h to avoid build warnings: Warning: ../drivers/mtd/devices/docg3.h:276 bad line: Warning: drivers/mtd/devices/docg3.h:299 struct member 'max_block' not described in 'docg3' Signed-off-by: Randy Dunlap Signed-off-by: Miquel Raynal

mtd: intel-dg: wake card on operations

2025-10-28T16:24:49+00:00

The Intel DG cards do not have separate power control for persistent memory. The memory is available when the whole card is awake. Enable runtime PM in mtd driver to notify parent graphics driver that whole card should be kept awake while nvm operations are performed through this driver. Signed-off-by: Alexander Usyskin Signed-off-by: Miquel Raynal

mtd: MTD_INTEL_DG should depend on DRM_I915 or DRM_XE

2025-08-28T12:22:48+00:00

Intel Discrete Graphics non-volatile memory is only present on Intel discrete graphics devices, and its auxiliary device is instantiated by the Intel i915 and Xe2 DRM drivers. Hence add dependencies on DRM_I915 and DRM_XE, to prevent asking the user about this driver when configuring a kernel without Intel graphics support. Fixes: ceb5ab3cb6463795 ("mtd: add driver for intel graphics non-volatile memory device") Signed-off-by: Geert Uytterhoeven Signed-off-by: Miquel Raynal

drm/xe/nvm: add support for non-posted erase

2025-06-23T17:14:50+00:00

Erase command is slow on discrete graphics storage and may overshot PCI completion timeout. BMG introduces the ability to have non-posted erase. Add driver support for non-posted erase with polling for erase completion. Reviewed-by: Rodrigo Vivi Acked-by: Rodrigo Vivi Signed-off-by: Reuven Abliyev Signed-off-by: Alexander Usyskin Link: https://lore.kernel.org/r/20250617145159.3803852-9-alexander.usyskin@intel.com Signed-off-by: Rodrigo Vivi

mtd: intel-dg: align 64bit read and write

2025-06-23T17:14:49+00:00

GSC NVM controller HW errors on quad access overlapping 1K border. Align 64bit read and write to avoid readq/writeq over 1K border. Reviewed-by: Raag Jadav Acked-by: Miquel Raynal Signed-off-by: Alexander Usyskin Link: https://lore.kernel.org/r/20250617145159.3803852-6-alexander.usyskin@intel.com Signed-off-by: Rodrigo Vivi

mtd: intel-dg: register with mtd

2025-06-23T17:14:49+00:00

Register the on-die nvm device with the mtd subsystem. Refcount nvm object on _get and _put mtd callbacks. For erase operation address and size should be 4K aligned. For write operation address and size has to be 4bytes aligned. CC: Rodrigo Vivi CC: Lucas De Marchi Reviewed-by: Raag Jadav Acked-by: Miquel Raynal Co-developed-by: Tomas Winkler Signed-off-by: Tomas Winkler Co-developed-by: Vitaly Lubart Signed-off-by: Vitaly Lubart Signed-off-by: Alexander Usyskin Link: https://lore.kernel.org/r/20250617145159.3803852-5-alexander.usyskin@intel.com Signed-off-by: Rodrigo Vivi

mtd: intel-dg: implement access functions

2025-06-23T17:14:49+00:00

Implement read(), erase() and write() functions. CC: Lucas De Marchi CC: Rodrigo Vivi Reviewed-by: Raag Jadav Acked-by: Miquel Raynal Co-developed-by: Tomas Winkler Signed-off-by: Tomas Winkler Co-developed-by: Vitaly Lubart Signed-off-by: Vitaly Lubart Signed-off-by: Alexander Usyskin Link: https://lore.kernel.org/r/20250617145159.3803852-4-alexander.usyskin@intel.com Signed-off-by: Rodrigo Vivi

mtd: intel-dg: implement region enumeration

2025-06-23T17:14:49+00:00

In intel-dg, there is no access to the spi controller, the information is extracted from the descriptor region. CC: Lucas De Marchi Reviewed-by: Raag Jadav Reviewed-by: Rodrigo Vivi Acked-by: Miquel Raynal Co-developed-by: Tomas Winkler Signed-off-by: Tomas Winkler Signed-off-by: Alexander Usyskin Link: https://lore.kernel.org/r/20250617145159.3803852-3-alexander.usyskin@intel.com Signed-off-by: Rodrigo Vivi

mtd: add driver for intel graphics non-volatile memory device

2025-06-23T17:14:49+00:00

Add auxiliary driver for intel discrete graphics non-volatile memory device. CC: Lucas De Marchi Reviewed-by: Raag Jadav Reviewed-by: Rodrigo Vivi Acked-by: Miquel Raynal Co-developed-by: Tomas Winkler Signed-off-by: Tomas Winkler Signed-off-by: Alexander Usyskin Link: https://lore.kernel.org/r/20250617145159.3803852-2-alexander.usyskin@intel.com Signed-off-by: Rodrigo Vivi