[PATCH v3 2/5] arcmsr: fixes not release allocated resource

[Ching Huang <ching2048@areca.com.tw>]

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(&reg->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;
 }
 
 static bool arcmsr_hbaC_get_config(struct AdapterControlBlock *pACB)