[SCSI] megaraid_sas: replace pci_alloc_consitent with dma_alloc_coherent in ioctl path
Replaced pci_alloc_consistent with dma_alloc_coherent from the ioctl path.
This is to avoid situations where ioctl fails for lack of memory
(when system under heavy stress).
Signed-off-by: Sumant Patro <sumant.patro@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/megaraid/megaraid_sas.c b/drivers/scsi/megaraid/megaraid_sas.c
index 9c5e4da..4070894 100644
--- a/drivers/scsi/megaraid/megaraid_sas.c
+++ b/drivers/scsi/megaraid/megaraid_sas.c
@@ -2711,9 +2711,9 @@
* For each user buffer, create a mirror buffer and copy in
*/
for (i = 0; i < ioc->sge_count; i++) {
- kbuff_arr[i] = pci_alloc_consistent(instance->pdev,
+ kbuff_arr[i] = dma_alloc_coherent(&instance->pdev->dev,
ioc->sgl[i].iov_len,
- &buf_handle);
+ &buf_handle, GFP_KERNEL);
if (!kbuff_arr[i]) {
printk(KERN_DEBUG "megasas: Failed to alloc "
"kernel SGL buffer for IOCTL \n");
@@ -2740,8 +2740,8 @@
}
if (ioc->sense_len) {
- sense = pci_alloc_consistent(instance->pdev, ioc->sense_len,
- &sense_handle);
+ sense = dma_alloc_coherent(&instance->pdev->dev, ioc->sense_len,
+ &sense_handle, GFP_KERNEL);
if (!sense) {
error = -ENOMEM;
goto out;
@@ -2800,12 +2800,12 @@
out:
if (sense) {
- pci_free_consistent(instance->pdev, ioc->sense_len,
+ dma_free_coherent(&instance->pdev->dev, ioc->sense_len,
sense, sense_handle);
}
for (i = 0; i < ioc->sge_count && kbuff_arr[i]; i++) {
- pci_free_consistent(instance->pdev,
+ dma_free_coherent(&instance->pdev->dev,
kern_sge32[i].length,
kbuff_arr[i], kern_sge32[i].phys_addr);
}