This is a note to let you know that I've just added the patch titled
cxgb4: fix eeprom len when diagnostics not implemented
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
cxgb4-fix-eeprom-len-when-diagnostics-not-implemente.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 8bdc9ce91a7e2f86dc043a63e08985a893c890f0
Author: Rahul Lakkireddy <rahul.lakkireddy@xxxxxxxxxxx>
Date: Thu Nov 11 15:55:16 2021 +0530
cxgb4: fix eeprom len when diagnostics not implemented
[ Upstream commit 4ca110bf8d9b31a60f8f8ff6706ea147d38ad97c ]
Ensure diagnostics monitoring support is implemented for the SFF 8472
compliant port module and set the correct length for ethtool port
module eeprom read.
Fixes: f56ec6766dcf ("cxgb4: Add support for ethtool i2c dump")
Signed-off-by: Manoj Malviya <manojmalviya@xxxxxxxxxxx>
Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@xxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ethtool.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ethtool.c
index d07230c892a54..db0248ab7fe4a 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ethtool.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ethtool.c
@@ -1304,12 +1304,15 @@ static int cxgb4_get_module_info(struct net_device *dev,
if (ret)
return ret;
- if (!sff8472_comp || (sff_diag_type & 4)) {
+ if (!sff8472_comp || (sff_diag_type & SFP_DIAG_ADDRMODE)) {
modinfo->type = ETH_MODULE_SFF_8079;
modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN;
} else {
modinfo->type = ETH_MODULE_SFF_8472;
- modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN;
+ if (sff_diag_type & SFP_DIAG_IMPLEMENTED)
+ modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN;
+ else
+ modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN / 2;
}
break;
diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.h b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.h
index 361d5032c2884..91603639ac428 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.h
@@ -292,6 +292,8 @@ enum {
#define I2C_PAGE_SIZE 0x100
#define SFP_DIAG_TYPE_ADDR 0x5c
#define SFP_DIAG_TYPE_LEN 0x1
+#define SFP_DIAG_ADDRMODE BIT(2)
+#define SFP_DIAG_IMPLEMENTED BIT(6)
#define SFF_8472_COMP_ADDR 0x5e
#define SFF_8472_COMP_LEN 0x1
#define SFF_REV_ADDR 0x1
