From: Lianbo Jiang lijiang@redhat.com
[ Upstream commit 1d94f06e7f5df4064ef336b7b710f50143b64a53 ]
When SME is enabled, the smartpqi driver won't work on the HP DL385 G10 machine, which causes the failure of kernel boot because it fails to allocate pqi error buffer. Please refer to the kernel log: .... [ 9.431749] usbcore: registered new interface driver uas [ 9.441524] Microsemi PQI Driver (v1.1.4-130) [ 9.442956] i40e 0000:04:00.0: fw 6.70.48768 api 1.7 nvm 10.2.5 [ 9.447237] smartpqi 0000:23:00.0: Microsemi Smart Family Controller found Starting dracut initqueue hook... [ OK ] Started Show Plymouth Boot Scre[ 9.471654] Broadcom NetXtreme-C/E driver bnxt_en v1.9.1 en. [ OK ] Started Forward Password Requests to Plymouth Directory Watch. [[0;[ 9.487108] smartpqi 0000:23:00.0: failed to allocate PQI error buffer .... [ 139.050544] dracut-initqueue[949]: Warning: dracut-initqueue timeout - starting timeout scripts [ 139.589779] dracut-initqueue[949]: Warning: dracut-initqueue timeout - starting timeout scripts
Basically, the fact that the coherent DMA mask value wasn't set caused the driver to fall back to SWIOTLB when SME is active.
For correct operation, lets call the dma_set_mask_and_coherent() to properly set the mask for both streaming and coherent, in order to inform the kernel about the devices DMA addressing capabilities.
Signed-off-by: Lianbo Jiang lijiang@redhat.com Acked-by: Don Brace don.brace@microsemi.com Tested-by: Don Brace don.brace@microsemi.com Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/scsi/smartpqi/smartpqi_init.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c index 5ec2898d21cd..d34351c6b9af 100644 --- a/drivers/scsi/smartpqi/smartpqi_init.c +++ b/drivers/scsi/smartpqi/smartpqi_init.c @@ -6392,7 +6392,7 @@ static int pqi_pci_init(struct pqi_ctrl_info *ctrl_info) else mask = DMA_BIT_MASK(32);
- rc = dma_set_mask(&ctrl_info->pci_dev->dev, mask); + rc = dma_set_mask_and_coherent(&ctrl_info->pci_dev->dev, mask); if (rc) { dev_err(&ctrl_info->pci_dev->dev, "failed to set DMA mask\n"); goto disable_device;