ACPI: scan: Rearrange memory allocation in acpi_device_add()

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The upfront allocation of new_bus_id is done to avoid allocating
memory under acpi_device_lock, but it doesn't really help,
because (1) it leads to many unnecessary memory allocations for
_ADR devices, (2) kstrdup_const() is run under that lock anyway and
(3) it complicates the code.

Rearrange acpi_device_add() to allocate memory for a new struct
acpi_device_bus_id instance only when necessary, eliminate a redundant
local variable from it and reduce the number of labels in there.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>

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Rafael J. Wysocki 2021-01-14 19:46:47 +01:00

parent 6ee1d745b7

commit c1013ff7a5

1 changed files with 26 additions and 31 deletions

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drivers/acpi/scan.c

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