diff mbox series

[net,5/5] pds_core: pass opcode to devcmd_wait

Message ID 20230824161754.34264-6-shannon.nelson@amd.com (mailing list archive)
State Accepted
Commit 0ea064e74bc8f915aba3f2d0fb3418247a09b73d
Delegated to: Netdev Maintainers
Headers show
Series pds_core: error handling fixes | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net
netdev/fixes_present success Fixes tag present in non-next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 9 this patch: 9
netdev/cc_maintainers warning 2 maintainers not CCed: pabeni@redhat.com edumazet@google.com
netdev/build_clang success Errors and warnings before: 1351 this patch: 1351
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success Fixes tag looks correct
netdev/build_allmodconfig_warn success Errors and warnings before: 1351 this patch: 1351
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 25 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Nelson, Shannon Aug. 24, 2023, 4:17 p.m. UTC 
Don't rely on the PCI memory for the devcmd opcode because we
read a 0xff value if the PCI bus is broken, which can cause us
to report a bogus dev_cmd opcode later.

Fixes: 523847df1b37 ("pds_core: add devcmd device interfaces")
Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Reviewed-by: Brett Creeley <brett.creeley@amd.com>
---
 drivers/net/ethernet/amd/pds_core/dev.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/amd/pds_core/dev.c b/drivers/net/ethernet/amd/pds_core/dev.c
index 524f422ee7ac..f77cd9f5a2fd 100644
--- a/drivers/net/ethernet/amd/pds_core/dev.c
+++ b/drivers/net/ethernet/amd/pds_core/dev.c
@@ -121,7 +121,7 @@  static const char *pdsc_devcmd_str(int opcode)
 	}
 }
 
-static int pdsc_devcmd_wait(struct pdsc *pdsc, int max_seconds)
+static int pdsc_devcmd_wait(struct pdsc *pdsc, u8 opcode, int max_seconds)
 {
 	struct device *dev = pdsc->dev;
 	unsigned long start_time;
@@ -131,9 +131,6 @@  static int pdsc_devcmd_wait(struct pdsc *pdsc, int max_seconds)
 	int done = 0;
 	int err = 0;
 	int status;
-	int opcode;
-
-	opcode = ioread8(&pdsc->cmd_regs->cmd.opcode);
 
 	start_time = jiffies;
 	max_wait = start_time + (max_seconds * HZ);
@@ -180,7 +177,7 @@  int pdsc_devcmd_locked(struct pdsc *pdsc, union pds_core_dev_cmd *cmd,
 
 	memcpy_toio(&pdsc->cmd_regs->cmd, cmd, sizeof(*cmd));
 	pdsc_devcmd_dbell(pdsc);
-	err = pdsc_devcmd_wait(pdsc, max_seconds);
+	err = pdsc_devcmd_wait(pdsc, cmd->opcode, max_seconds);
 	memcpy_fromio(comp, &pdsc->cmd_regs->comp, sizeof(*comp));
 
 	if ((err == -ENXIO || err == -ETIMEDOUT) && pdsc->wq)