5.4-stable review patch. If anyone has any objections, please let me know.
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From: Alok Tiwari alok.a.tiwari@oracle.com
[ Upstream commit b79e498080b170fd94fc83bca2471f450811549b ]
The current code incorrectly passes (XIRCREG1_ECR | FullDuplex) as the register address to GetByte(), instead of fetching the register value and OR-ing it with FullDuplex. This results in an invalid register access.
Fix it by reading XIRCREG1_ECR first, then or-ing with FullDuplex before writing it back.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Alok Tiwari alok.a.tiwari@oracle.com Reviewed-by: Simon Horman horms@kernel.org Reviewed-by: Jacob Keller jacob.e.keller@intel.com Link: https://patch.msgid.link/20250827192645.658496-1-alok.a.tiwari@oracle.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/xircom/xirc2ps_cs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/xircom/xirc2ps_cs.c b/drivers/net/ethernet/xircom/xirc2ps_cs.c index e3438cef5f9c6..4d8a1728e8ed6 100644 --- a/drivers/net/ethernet/xircom/xirc2ps_cs.c +++ b/drivers/net/ethernet/xircom/xirc2ps_cs.c @@ -1584,7 +1584,7 @@ do_reset(struct net_device *dev, int full) msleep(40); /* wait 40 msec to let it complete */ } if (full_duplex) - PutByte(XIRCREG1_ECR, GetByte(XIRCREG1_ECR | FullDuplex)); + PutByte(XIRCREG1_ECR, GetByte(XIRCREG1_ECR) | FullDuplex); } else { /* No MII */ SelectPage(0); value = GetByte(XIRCREG_ESR); /* read the ESR */