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net: aquantia: temperature retrieval fix

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Chip temperature is a two byte word, colocated internally with cable
length data. We do all readouts from HW memory by dwords, thus
we should clear extra high bytes, otherwise temperature output
gets weird as soon as we attach a cable to the NIC.

Fixes: 8f89401186 ("net: aquantia: add infrastructure to readout chip temperature")
Tested-by: Holger Hoffstätte <holger@applied-asynchrony.com>
Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Igor Russkikh 2019-10-11 13:45:19 +00:00 committed by David S. Miller
parent 33902b4a42
commit 06b0d7fe7e
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils_fw2x.c
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@ -337,7 +337,7 @@ static int aq_fw2x_get_phy_temp(struct aq_hw_s *self, int *temp)
/* Convert PHY temperature from 1/256 degree Celsius
* to 1/1000 degree Celsius.
*/
*temp = temp_res * 1000 / 256;
*temp = (temp_res & 0xFFFF) * 1000 / 256;
return 0;
}