mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-10-30 22:03:17 +01:00
Geert Uytterhoeven
30332eeefe
Hardware registers of devices under control of power management cannot be accessed at all times. If such a device is suspended, register accesses may lead to undefined behavior, like reading bogus values, or causing exceptions or system lock-ups. Extend struct debugfs_regset32 with an optional field to let device drivers specify the device the registers in the set belong to. This allows debugfs_show_regset32() to make sure the device is resumed while its registers are being read. Signed-off-by: Geert Uytterhoeven <[email protected]> Reviewed-by: Niklas Söderlund <[email protected]> Reviewed-by: Greg Kroah-Hartman <[email protected]> Acked-by: Rafael J. Wysocki <[email protected]> Signed-off-by: Herbert Xu <[email protected]>