Re: [PATCH] [v2] scsi: mpi3mr: reduce stack usage in mpi3mr_refresh_sas_ports()

[Martin K. Petersen]

On Tue, 23 Jan 2024 14:07:36 +0100, Arnd Bergmann wrote:

> Doubling the number of PHYs also doubled the stack usage of this function,
> exceeding the 32-bit limit of 1024 bytes:
> 
> drivers/scsi/mpi3mr/mpi3mr_transport.c: In function 'mpi3mr_refresh_sas_ports':
> drivers/scsi/mpi3mr/mpi3mr_transport.c:1818:1: error: the frame size of 1636 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]
> 
> Since the sas_io_unit_pg0 structure is already allocated dynamically, use
> the same method here. The size of the allocation can be smaller based on the
> actual number of phys now, so use this as an upper bound.
> 
> [...]

Applied to 6.8/scsi-fixes, thanks!

[1/1] scsi: mpi3mr: reduce stack usage in mpi3mr_refresh_sas_ports()
      https://git.kernel.org/mkp/scsi/c/5cc2da0b60e5

-- 
Martin K. Petersen	Oracle Linux Engineering