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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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gpio: pci-idio-16: Define maximum valid register address offset

Attempting to load the pci-idio-16 module fails during regmap
initialization with a return error -EINVAL. This is a result of the
regmap cache failing initialization. Set the idio_16_regmap_config
max_register member to fix this failure.

Fixes: 73d8f3efc5c2 ("gpio: pci-idio-16: Migrate to the regmap API")
Reported-by: Mark Cave-Ayland <mark.caveayland@nutanix.com>
Closes: https://lore.kernel.org/r/9b0375fd-235f-4ee1-a7fa-daca296ef6bf@nutanix.com
Suggested-by: Mark Cave-Ayland <mark.caveayland@nutanix.com>
Cc: stable@vger.kernel.org
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: William Breathitt Gray <wbg@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20251020-fix-gpio-idio-16-regmap-v2-2-ebeb50e93c33@kernel.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

authored by

William Breathitt Gray and committed by
Bartosz Golaszewski d3762313 c4d35e63

+1
+1
drivers/gpio/gpio-pci-idio-16.c
··· 41 41 .reg_stride = 1, 42 42 .val_bits = 8, 43 43 .io_port = true, 44 + .max_register = 0x7, 44 45 .wr_table = &idio_16_wr_table, 45 46 .rd_table = &idio_16_rd_table, 46 47 .volatile_table = &idio_16_rd_table,