Messages in this thread | | | Subject | Re: [PATCH v3 2/5] arcmsr: fixes not release allocated resource | From | Tomas Henzl <> | Date | Thu, 26 Nov 2015 14:08:02 +0100 |
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On 26.11.2015 08:32, Ching Huang wrote: > On Wed, 2015-11-25 at 14:55 +0100, Tomas Henzl wrote: >> On 25.11.2015 12:41, Ching Huang wrote: >>> From: Ching Huang <ching2048@areca.com.tw> >>> >>> Releasing allocated resource if get configuration data failed. >>> >>> Signed-of-by: Ching Huang <ching2048@areca.com.tw> >>> >>> --- >>> >>> diff -uprN a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c >>> --- a/drivers/scsi/arcmsr/arcmsr_hba.c 2015-11-24 11:35:26.000000000 +0800 >>> +++ b/drivers/scsi/arcmsr/arcmsr_hba.c 2015-11-25 19:04:44.590970000 +0800 >>> @@ -2664,7 +2664,7 @@ static bool arcmsr_hbaB_get_config(struc >>> if (!arcmsr_hbaB_wait_msgint_ready(acb)) { >>> printk(KERN_NOTICE "arcmsr%d: wait 'get adapter firmware \ >>> miscellaneous data' timeout \n", acb->host->host_no); >>> - return false; >>> + goto err_free_dma; >>> } >>> count = 8; >>> while (count){ >>> @@ -2707,6 +2707,10 @@ static bool arcmsr_hbaB_get_config(struc >>> acb->firm_cfg_version = readl(®->message_rwbuffer[25]); /*firm_cfg_version,25,100-103*/ >>> /*firm_ide_channels,4,16-19*/ >>> return true; >>> +err_free_dma: >>> + dma_free_coherent(&acb->pdev->dev, acb->roundup_ccbsize, >>> + acb->dma_coherent2, acb->dma_coherent_handle2); >>> + return false; >>> } >>> >> The resource should be released here, that is okay. >> >> How works the resource management when the eh_bus_reset_handler >> is called ? It looks to me that you allocate a new >> acb->dma_coherent2 without releasing it before. >> Btw. is it needed in that handler to re-read the firmware-spec? >> >> Tomas >> > You are right. In eh_bus_reset_handler, there may re-allocate a new dma resource if call get_config again. > I will initiate a new patches for this bug after current 5 patches. > Thanks Tomas.
ok, so for this patch -
Reviewed-by: Tomas Henzl <thenzl@redhat.com> Tomas
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