Re: [PATCH] small sym-2 fix

[Gérard Roudier]

On Thu, 15 Nov 2001, Anton Blanchard wrote:

>
> Hi,
>
> I tested the sym-2 driver on ppc64 and found that hcb_p can be > 1 page
> but __sym_malloc fails for allocations over 1 page. This means we
> die in sym_attach.

The driver should not need more than 4096 bytes for a single allocation.
If the ppc64 page size is smaller, your patch is ok, otherwise something
may have to be fixed, likely in the driver. I cannot access to kernel
source immediately but I will check what kind of page size ppc64 is using
asap.

> With this patch the sym-2 works on ppc64. BTW so far it looks solid :)

Great!

Thanks for your report.

Regards,
  Gérard.
>
> Anton
>
> diff -urN 2.4.15-pre4/drivers/scsi/sym53c8xx_2/sym_glue.h linuxppc_2_4_devel_work/drivers/scsi/sym53c8xx_2/sym_glue.h
> --- 2.4.15-pre4/drivers/scsi/sym53c8xx_2/sym_glue.h	Thu Nov 15 13:38:02 2001
> +++ linuxppc_2_4_devel_work/drivers/scsi/sym53c8xx_2/sym_glue.h	Tue Nov 13 18:03:07 2001
> @@ -526,7 +526,7 @@
>   *  couple of things related to the memory allocator.
>   */
>  typedef u_long m_addr_t;	/* Enough bits to represent any address */
> -#define SYM_MEM_PAGE_ORDER 0	/* 1 PAGE  maximum */
> +#define SYM_MEM_PAGE_ORDER 1	/* 2 PAGE  maximum */
>  #define SYM_MEM_CLUSTER_SHIFT	(PAGE_SHIFT+SYM_MEM_PAGE_ORDER)
>  #ifdef	MODULE
>  #define SYM_MEM_FREE_UNUSED	/* Free unused pages immediately */
>
>