diff mbox series

qed: Use dma_set_mask_and_coherent() and simplify code

Message ID 40af8d810ef06bb10f45e54a61494b5c42038841.1641115135.git.christophe.jaillet@wanadoo.fr (mailing list archive)
State Accepted
Commit 4f9f531e1505a126b4d66d8a8a29e8e54fa4075c
Delegated to: Netdev Maintainers
Headers show
Series qed: Use dma_set_mask_and_coherent() and simplify code | expand

Checks

Context Check Description
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix warning Target tree name not specified in the subject
netdev/cover_letter success Single patches do not need cover letters
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers success CCed 5 of 5 maintainers
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 41 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
netdev/tree_selection success Guessing tree name failed - patch did not apply

Commit Message

Christophe JAILLET Jan. 2, 2022, 9:20 a.m. UTC 
Use dma_set_mask_and_coherent() instead of unrolling it with some
dma_set_mask()+dma_set_coherent_mask().

Moreover, as stated in [1], dma_set_mask() with a 64-bit mask will never
fail if dev->dma_mask is non-NULL.
So, if it fails, the 32 bits case will also fail for the same reason.

Simplify code and remove some dead code accordingly.

Now that qed_set_coherency_mask() is mostly a single call to
dma_set_mask_and_coherent(), fold it in its only caller.

[1]: https://lkml.org/lkml/2021/6/7/398

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
 drivers/net/ethernet/qlogic/qed/qed_main.c | 28 ++++------------------
 1 file changed, 5 insertions(+), 23 deletions(-)

Comments

patchwork-bot+netdevbpf@kernel.org Jan. 2, 2022, 4:20 p.m. UTC | #1 
Hello:

This patch was applied to netdev/net-next.git (master)
by David S. Miller <davem@davemloft.net>:

On Sun,  2 Jan 2022 10:20:05 +0100 you wrote:
> Use dma_set_mask_and_coherent() instead of unrolling it with some
> dma_set_mask()+dma_set_coherent_mask().
> 
> Moreover, as stated in [1], dma_set_mask() with a 64-bit mask will never
> fail if dev->dma_mask is non-NULL.
> So, if it fails, the 32 bits case will also fail for the same reason.
> 
> [...]

Here is the summary with links:
  - qed: Use dma_set_mask_and_coherent() and simplify code
    https://git.kernel.org/netdev/net-next/c/4f9f531e1505

You are awesome, thank you!
diff mbox series

Patch

diff --git a/drivers/net/ethernet/qlogic/qed/qed_main.c b/drivers/net/ethernet/qlogic/qed/qed_main.c
index 46d4207f22a3..c5003fa1a25e 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_main.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_main.c
@@ -255,27 +255,6 @@  static void __exit qed_exit(void)
 }
 module_exit(qed_exit);
 
-/* Check if the DMA controller on the machine can properly handle the DMA
- * addressing required by the device.
- */
-static int qed_set_coherency_mask(struct qed_dev *cdev)
-{
-	struct device *dev = &cdev->pdev->dev;
-
-	if (dma_set_mask(dev, DMA_BIT_MASK(64)) == 0) {
-		if (dma_set_coherent_mask(dev, DMA_BIT_MASK(64)) != 0) {
-			DP_NOTICE(cdev,
-				  "Can't request 64-bit consistent allocations\n");
-			return -EIO;
-		}
-	} else if (dma_set_mask(dev, DMA_BIT_MASK(32)) != 0) {
-		DP_NOTICE(cdev, "Can't request 64b/32b DMA addresses\n");
-		return -EIO;
-	}
-
-	return 0;
-}
-
 static void qed_free_pci(struct qed_dev *cdev)
 {
 	struct pci_dev *pdev = cdev->pdev;
@@ -351,9 +330,12 @@  static int qed_init_pci(struct qed_dev *cdev, struct pci_dev *pdev)
 	if (IS_PF(cdev) && !cdev->pci_params.pm_cap)
 		DP_NOTICE(cdev, "Cannot find power management capability\n");
 
-	rc = qed_set_coherency_mask(cdev);
-	if (rc)
+	rc = dma_set_mask_and_coherent(&cdev->pdev->dev, DMA_BIT_MASK(64));
+	if (rc) {
+		DP_NOTICE(cdev, "Can't request DMA addresses\n");
+		rc = -EIO;
 		goto err2;
+	}
 
 	cdev->pci_params.mem_start = pci_resource_start(pdev, 0);
 	cdev->pci_params.mem_end = pci_resource_end(pdev, 0);