linux-kernel - [patch] [SCSI] mvumi: use GFP

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Message-ID: <20120929071424.GF10993@elgon.mountain>
Date:	Sat, 29 Sep 2012 10:14:24 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	"James E.J. Bottomley" <JBottomley@...allels.com>
Cc:	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [patch] [SCSI] mvumi: use GFP_ATOMIC under spin lock

This is called from the interrupt handler and with spin_locks held.  Use
GFP_ATOMIC.  The call tree looks like:
  mvumi_isr_handler() <- takes a spin lock
  -> mvumi_handshake()
     -> mvumi_init_data()
        -> mvumi_alloc_mem_resource() <- GFP_KERNEL

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

diff --git a/drivers/scsi/mvumi.c b/drivers/scsi/mvumi.c
index 783edc7..5ad8da4 100644
--- a/drivers/scsi/mvumi.c
+++ b/drivers/scsi/mvumi.c
@@ -118,7 +118,7 @@ static int mvumi_map_pci_addr(struct pci_dev *dev, void **addr_array)
 static struct mvumi_res *mvumi_alloc_mem_resource(struct mvumi_hba *mhba,
 				enum resource_type type, unsigned int size)
 {
-	struct mvumi_res *res = kzalloc(sizeof(*res), GFP_KERNEL);
+	struct mvumi_res *res = kzalloc(sizeof(*res), GFP_ATOMIC);
 
 	if (!res) {
 		dev_err(&mhba->pdev->dev,
@@ -128,7 +128,7 @@ static struct mvumi_res *mvumi_alloc_mem_resource(struct mvumi_hba *mhba,
 
 	switch (type) {
 	case RESOURCE_CACHED_MEMORY:
-		res->virt_addr = kzalloc(size, GFP_KERNEL);
+		res->virt_addr = kzalloc(size, GFP_ATOMIC);
 		if (!res->virt_addr) {
 			dev_err(&mhba->pdev->dev,
 				"unable to allocate memory,size = %d.\n", size);
--
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