Re: [PATCH 7/7] ocxl: Use pci core's DVSEC functionality

From
Dan Williams <hidden>
Date
2021-09-22 00:46:02
Also in
linux-cxl, linux-pci
Reply to
Ben Widawsky, 2021-09-21
On Tue, Sep 21, 2021 at 3:05 PM Ben Widawsky [off-list ref] wrote:
quoted hunk ↗ jump to hunk
Reduce maintenance burden of DVSEC query implementation by using the
centralized PCI core implementation.

Cc: <redacted>
Cc: Frederic Barrat <redacted>
Cc: Andrew Donnellan <redacted>
Signed-off-by: Ben Widawsky <redacted>
---
 drivers/misc/ocxl/config.c | 13 +------------
 1 file changed, 1 insertion(+), 12 deletions(-)
diff --git a/drivers/misc/ocxl/config.c b/drivers/misc/ocxl/config.c
index a68738f38252..e401a51596b9 100644
--- a/drivers/misc/ocxl/config.c
+++ b/drivers/misc/ocxl/config.c
@@ -33,18 +33,7 @@

 static int find_dvsec(struct pci_dev *dev, int dvsec_id)
 {
-       int vsec = 0;
-       u16 vendor, id;
-
-       while ((vsec = pci_find_next_ext_capability(dev, vsec,
-                                                   OCXL_EXT_CAP_ID_DVSEC))) {
-               pci_read_config_word(dev, vsec + OCXL_DVSEC_VENDOR_OFFSET,
-                               &vendor);
-               pci_read_config_word(dev, vsec + OCXL_DVSEC_ID_OFFSET, &id);
-               if (vendor == PCI_VENDOR_ID_IBM && id == dvsec_id)
-                       return vsec;
-       }
-       return 0;
+       return pci_find_dvsec_capability(dev, PCI_VENDOR_ID_IBM, dvsec_id);
 }
What about:

arch/powerpc/platforms/powernv/ocxl.c::find_dvsec_from_pos()

...?  With that converted the redundant definitions below:

OCXL_EXT_CAP_ID_DVSEC
OCXL_DVSEC_VENDOR_OFFSET
OCXL_DVSEC_ID_OFFSET

...can be cleaned up in favor of the core definitions.
Thread (3 messages) 3 messages, 3 authors, last reply 2021-09-22
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