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authorJulia Lawall <julia@diku.dk>2010-05-30 17:49:22 +0400
committerJames Bottomley <James.Bottomley@suse.de>2010-07-27 21:01:29 +0400
commitda2907ffd08a2d708c829ec171f05fe3ceab1315 (patch)
tree9c0a204817c3fd520b60adb085ede86b811392b3 /drivers/scsi/dpt_i2o.c
parentc0ff2775a1dcbaf2cbe3fb571ae5ea11b63ea590 (diff)
downloadlinux-da2907ffd08a2d708c829ec171f05fe3ceab1315.tar.xz
[SCSI] dpt_i2o: Use GFP_ATOMIC when a lock is held
The function adpt_i2o_post_wait is called from several places, in some of which, such as adpt_abort, a lock may be held. The functions adpt_i2o_reparse_lct and adpt_i2o_lct_get are called from several places, including adpt_rescan where a lock may be held. The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @gfp exists@ identifier fn; position p; @@ fn(...) { ... when != spin_unlock_irqrestore when any GFP_KERNEL@p ... when any } @locked@ identifier gfp.fn; @@ spin_lock_irqsave(...) ... when != spin_unlock_irqrestore fn(...) @depends on locked@ position gfp.p; @@ - GFP_KERNEL@p + GFP_ATOMIC // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi/dpt_i2o.c')
-rw-r--r--drivers/scsi/dpt_i2o.c15
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/scsi/dpt_i2o.c b/drivers/scsi/dpt_i2o.c
index b0c576f84b28..f2d4df14c311 100644
--- a/drivers/scsi/dpt_i2o.c
+++ b/drivers/scsi/dpt_i2o.c
@@ -1290,7 +1290,7 @@ static int adpt_i2o_post_wait(adpt_hba* pHba, u32* msg, int len, int timeout)
ulong flags = 0;
struct adpt_i2o_post_wait_data *p1, *p2;
struct adpt_i2o_post_wait_data *wait_data =
- kmalloc(sizeof(struct adpt_i2o_post_wait_data),GFP_KERNEL);
+ kmalloc(sizeof(struct adpt_i2o_post_wait_data), GFP_ATOMIC);
DECLARE_WAITQUEUE(wait, current);
if (!wait_data)
@@ -2651,7 +2651,8 @@ static s32 adpt_i2o_reparse_lct(adpt_hba* pHba)
pDev = pDev->next_lun;
}
if(!pDev ) { // Something new add it
- d = kmalloc(sizeof(struct i2o_device), GFP_KERNEL);
+ d = kmalloc(sizeof(struct i2o_device),
+ GFP_ATOMIC);
if(d==NULL)
{
printk(KERN_CRIT "Out of memory for I2O device data.\n");
@@ -2673,7 +2674,9 @@ static s32 adpt_i2o_reparse_lct(adpt_hba* pHba)
}
pDev = pHba->channel[bus_no].device[scsi_id];
if( pDev == NULL){
- pDev = kzalloc(sizeof(struct adpt_device),GFP_KERNEL);
+ pDev =
+ kzalloc(sizeof(struct adpt_device),
+ GFP_ATOMIC);
if(pDev == NULL) {
return -ENOMEM;
}
@@ -2682,7 +2685,9 @@ static s32 adpt_i2o_reparse_lct(adpt_hba* pHba)
while (pDev->next_lun) {
pDev = pDev->next_lun;
}
- pDev = pDev->next_lun = kzalloc(sizeof(struct adpt_device),GFP_KERNEL);
+ pDev = pDev->next_lun =
+ kzalloc(sizeof(struct adpt_device),
+ GFP_ATOMIC);
if(pDev == NULL) {
return -ENOMEM;
}
@@ -3127,7 +3132,7 @@ static int adpt_i2o_lct_get(adpt_hba* pHba)
if (pHba->lct == NULL) {
pHba->lct = dma_alloc_coherent(&pHba->pDev->dev,
pHba->lct_size, &pHba->lct_pa,
- GFP_KERNEL);
+ GFP_ATOMIC);
if(pHba->lct == NULL) {
printk(KERN_CRIT "%s: Lct Get failed. Out of memory.\n",
pHba->name);