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Code Issues Releases Wiki Activity

xirc2ps_cs: fix register access when enabling FullDuplex

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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: 1da177e4c3 ("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>
This commit is contained in:
Alok Tiwari 2025-08-27 12:26:43 -07:00 committed by Jakub Kicinski
parent 9f74c0ea9b
commit b79e498080
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/xircom/xirc2ps_cs.c
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@ -1576,7 +1576,7 @@ 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 */