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net: davinci_emac: Fix incorrect masking of tx and rx error channel

Message ID 20210420171614.385721-1-colin.king@canonical.com
State New
Headers show
Series net: davinci_emac: Fix incorrect masking of tx and rx error channel | expand

Commit Message

Colin King April 20, 2021, 5:16 p.m. UTC 
From: Colin Ian King <colin.king@canonical.com>

The bit-masks used for the TXERRCH and RXERRCH (tx and rx error channels)
are incorrect and always lead to a zero result. The mask values are
currently the incorrect post-right shifted values, fix this by setting
them to the currect values.

(I double checked these against the TMS320TCI6482 data sheet, section
5.30, page 127 to ensure I had the correct mask values for the TXERRCH
and RXERRCH fields in the MACSTATUS register).

Addresses-Coverity: ("Operands don't affect result")
Fixes: a6286ee630f6 ("net: Add TI DaVinci EMAC driver")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
 drivers/net/ethernet/ti/davinci_emac.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Comments

patchwork-bot+netdevbpf@kernel.org April 21, 2021, 12:20 a.m. UTC | #1 
Hello:

This patch was applied to netdev/net.git (refs/heads/master):

On Tue, 20 Apr 2021 18:16:14 +0100 you wrote:
> From: Colin Ian King <colin.king@canonical.com>

> 

> The bit-masks used for the TXERRCH and RXERRCH (tx and rx error channels)

> are incorrect and always lead to a zero result. The mask values are

> currently the incorrect post-right shifted values, fix this by setting

> them to the currect values.

> 

> [...]


Here is the summary with links:
  - net: davinci_emac: Fix incorrect masking of tx and rx error channel
    https://git.kernel.org/netdev/net/c/d83b8aa5207d

You are awesome, thank you!
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diff mbox series

Patch

diff --git a/drivers/net/ethernet/ti/davinci_emac.c b/drivers/net/ethernet/ti/davinci_emac.c
index 57450b174fc4..fb5eca688af9 100644
--- a/drivers/net/ethernet/ti/davinci_emac.c
+++ b/drivers/net/ethernet/ti/davinci_emac.c
@@ -183,11 +183,11 @@  static const char emac_version_string[] = "TI DaVinci EMAC Linux v6.1";
 /* EMAC mac_status register */
 #define EMAC_MACSTATUS_TXERRCODE_MASK	(0xF00000)
 #define EMAC_MACSTATUS_TXERRCODE_SHIFT	(20)
-#define EMAC_MACSTATUS_TXERRCH_MASK	(0x7)
+#define EMAC_MACSTATUS_TXERRCH_MASK	(0x70000)
 #define EMAC_MACSTATUS_TXERRCH_SHIFT	(16)
 #define EMAC_MACSTATUS_RXERRCODE_MASK	(0xF000)
 #define EMAC_MACSTATUS_RXERRCODE_SHIFT	(12)
-#define EMAC_MACSTATUS_RXERRCH_MASK	(0x7)
+#define EMAC_MACSTATUS_RXERRCH_MASK	(0x700)
 #define EMAC_MACSTATUS_RXERRCH_SHIFT	(8)
 
 /* EMAC RX register masks */