Re: [patch] [SCSI] arcmsr: upper 32 of dma address lost

Dan Carpenter
2014-02-07T13:07:15Z

On Fri, Feb 07, 2014 at 04:00:28PM +0300, Dan Carpenter wrote:
> The original code always set the upper 32 bits to zero because it was
> doing a shift of the wrong variable.
>

Actually let me redo this. I want to add a cast to prevent a static
checker warning on 32 bit systems. Sorry, for the noise.

regards,
dan carpenter

> Fixes: 1a4f550a09f8 ('[SCSI] arcmsr: 1.20.00.15: add SATA RAID plus other fixes')
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
>
> diff --git a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c
> index 4f6a30b8e5f9..9cfd399c47c0 100644
> --- a/drivers/scsi/arcmsr/arcmsr_hba.c
> +++ b/drivers/scsi/arcmsr/arcmsr_hba.c
> @@ -2500,16 +2500,15 @@ static int arcmsr_polling_ccbdone(struct AdapterControlBlock *acb,
> static int arcmsr_iop_confirm(struct AdapterControlBlock *acb)
> {
> uint32_t cdb_phyaddr, cdb_phyaddr_hi32;
> - dma_addr_t dma_coherent_handle;
> +
> /*
> ********************************************************************
> ** here we need to tell iop 331 our freeccb.HighPart
> ** if freeccb.HighPart is not zero
> ********************************************************************
> */
> - dma_coherent_handle = acb->dma_coherent_handle;
> - cdb_phyaddr = (uint32_t)(dma_coherent_handle);
> - cdb_phyaddr_hi32 = (uint32_t)((cdb_phyaddr >> 16) >> 16);
> + cdb_phyaddr = (uint32_t)(acb->dma_coherent_handle);
> + cdb_phyaddr_hi32 = (uint32_t)(acb->dma_coherent_handle >> 32);
> acb->cdb_phyaddr_hi32 = cdb_phyaddr_hi32;
> /*
> ***********************************************************************