i40e: check for AQ timeout in aq_rc decode

Decoding the AQ return code is great except when the AQ send timed out
and there's no return code set.  This changes the handy decoder
interface to help catch and properly report the condition as a useful
errno rather than returning a misleading '0'.

Change-ID: I07a1f94f921606da49ffac7837bcdc37cd8222eb
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Acked-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Jim Young <jamesx.m.young@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_adminq.h b/drivers/net/ethernet/intel/i40e/i40e_adminq.h
index 2c68bf7ccd1e8abf5cf0115562aec5a17c0ac0cb..564d0b0192f789aad0b4af4ceed04fe9fd15cd06 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_adminq.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_adminq.h
@@ -28,6 +28,7 @@
 #define _I40E_ADMINQ_H_
 
 #include "i40e_osdep.h"
+#include "i40e_status.h"
 #include "i40e_adminq_cmd.h"
 
 #define I40E_ADMINQ_DESC(R, i)   \
@@ -108,7 +109,7 @@ struct i40e_adminq_info {
  * i40e_aq_rc_to_posix - convert errors to user-land codes
  * aq_rc: AdminQ error code to convert
  **/
-static inline int i40e_aq_rc_to_posix(u16 aq_rc)
+static inline int i40e_aq_rc_to_posix(u32 aq_ret, u16 aq_rc)
 {
        int aq_to_posix[] = {
                0,           /* I40E_AQ_RC_OK */
@@ -136,6 +137,10 @@ static inline int i40e_aq_rc_to_posix(u16 aq_rc)
                -EFBIG,      /* I40E_AQ_RC_EFBIG */
        };
 
+       /* aq_rc is invalid if AQ timed out */
+       if (aq_ret == I40E_ERR_ADMIN_QUEUE_TIMEOUT)
+               return -EAGAIN;
+
        if (aq_rc >= ARRAY_SIZE(aq_to_posix))
                return -ERANGE;
        return aq_to_posix[aq_rc];

diff --git a/drivers/net/ethernet/intel/i40e/i40e_nvm.c b/drivers/net/ethernet/intel/i40e/i40e_nvm.c
index 0fc62fc941e8cd6fb9b8f5e63e81e0398c5388cb..1613ef4f9567855a859654543e1eceffb1fb8183 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_nvm.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_nvm.c
@@ -527,7 +527,8 @@ static i40e_status i40e_nvmupd_state_init(struct i40e_hw *hw,
        case I40E_NVMUPD_READ_SA:
                status = i40e_acquire_nvm(hw, I40E_RESOURCE_READ);
                if (status) {
-                       *errno = i40e_aq_rc_to_posix(hw->aq.asq_last_status);
+                       *errno = i40e_aq_rc_to_posix(status,
+                                                    hw->aq.asq_last_status);
                } else {
                        status = i40e_nvmupd_nvm_read(hw, cmd, bytes, errno);
                        i40e_release_nvm(hw);
@@ -537,7 +538,8 @@ static i40e_status i40e_nvmupd_state_init(struct i40e_hw *hw,
        case I40E_NVMUPD_READ_SNT:
                status = i40e_acquire_nvm(hw, I40E_RESOURCE_READ);
                if (status) {
-                       *errno = i40e_aq_rc_to_posix(hw->aq.asq_last_status);
+                       *errno = i40e_aq_rc_to_posix(status,
+                                                    hw->aq.asq_last_status);
                } else {
                        status = i40e_nvmupd_nvm_read(hw, cmd, bytes, errno);
                        if (status)
@@ -550,7 +552,8 @@ static i40e_status i40e_nvmupd_state_init(struct i40e_hw *hw,
        case I40E_NVMUPD_WRITE_ERA:
                status = i40e_acquire_nvm(hw, I40E_RESOURCE_WRITE);
                if (status) {
-                       *errno = i40e_aq_rc_to_posix(hw->aq.asq_last_status);
+                       *errno = i40e_aq_rc_to_posix(status,
+                                                    hw->aq.asq_last_status);
                } else {
                        status = i40e_nvmupd_nvm_erase(hw, cmd, errno);
                        if (status)
@@ -563,7 +566,8 @@ static i40e_status i40e_nvmupd_state_init(struct i40e_hw *hw,
        case I40E_NVMUPD_WRITE_SA:
                status = i40e_acquire_nvm(hw, I40E_RESOURCE_WRITE);
                if (status) {
-                       *errno = i40e_aq_rc_to_posix(hw->aq.asq_last_status);
+                       *errno = i40e_aq_rc_to_posix(status,
+                                                    hw->aq.asq_last_status);
                } else {
                        status = i40e_nvmupd_nvm_write(hw, cmd, bytes, errno);
                        if (status)
@@ -576,7 +580,8 @@ static i40e_status i40e_nvmupd_state_init(struct i40e_hw *hw,
        case I40E_NVMUPD_WRITE_SNT:
                status = i40e_acquire_nvm(hw, I40E_RESOURCE_WRITE);
                if (status) {
-                       *errno = i40e_aq_rc_to_posix(hw->aq.asq_last_status);
+                       *errno = i40e_aq_rc_to_posix(status,
+                                                    hw->aq.asq_last_status);
                } else {
                        status = i40e_nvmupd_nvm_write(hw, cmd, bytes, errno);
                        if (status)
@@ -589,12 +594,14 @@ static i40e_status i40e_nvmupd_state_init(struct i40e_hw *hw,
        case I40E_NVMUPD_CSUM_SA:
                status = i40e_acquire_nvm(hw, I40E_RESOURCE_WRITE);
                if (status) {
-                       *errno = i40e_aq_rc_to_posix(hw->aq.asq_last_status);
+                       *errno = i40e_aq_rc_to_posix(status,
+                                                    hw->aq.asq_last_status);
                } else {
                        status = i40e_update_nvm_checksum(hw);
                        if (status) {
                                *errno = hw->aq.asq_last_status ?
-                                  i40e_aq_rc_to_posix(hw->aq.asq_last_status) :
+                                  i40e_aq_rc_to_posix(status,
+                                                      hw->aq.asq_last_status) :
                                   -EIO;
                                i40e_release_nvm(hw);
                        } else {
@@ -691,7 +698,8 @@ static i40e_status i40e_nvmupd_state_writing(struct i40e_hw *hw,
                status = i40e_update_nvm_checksum(hw);
                if (status) {
                        *errno = hw->aq.asq_last_status ?
-                                  i40e_aq_rc_to_posix(hw->aq.asq_last_status) :
+                                  i40e_aq_rc_to_posix(status,
+                                                      hw->aq.asq_last_status) :
                                   -EIO;
                        hw->nvmupd_state = I40E_NVMUPD_STATE_INIT;
                }
@@ -701,7 +709,8 @@ static i40e_status i40e_nvmupd_state_writing(struct i40e_hw *hw,
                status = i40e_update_nvm_checksum(hw);
                if (status)
                        *errno = hw->aq.asq_last_status ?
-                                  i40e_aq_rc_to_posix(hw->aq.asq_last_status) :
+                                  i40e_aq_rc_to_posix(status,
+                                                      hw->aq.asq_last_status) :
                                   -EIO;
                else
                        hw->aq.nvm_release_on_done = true;
@@ -839,7 +848,7 @@ static i40e_status i40e_nvmupd_nvm_read(struct i40e_hw *hw,
                i40e_debug(hw, I40E_DEBUG_NVM,
                           "i40e_nvmupd_nvm_read status %d aq %d\n",
                           status, hw->aq.asq_last_status);
-               *errno = i40e_aq_rc_to_posix(hw->aq.asq_last_status);
+               *errno = i40e_aq_rc_to_posix(status, hw->aq.asq_last_status);
        }
 
        return status;
@@ -873,7 +882,7 @@ static i40e_status i40e_nvmupd_nvm_erase(struct i40e_hw *hw,
                i40e_debug(hw, I40E_DEBUG_NVM,
                           "i40e_nvmupd_nvm_erase status %d aq %d\n",
                           status, hw->aq.asq_last_status);
-               *errno = i40e_aq_rc_to_posix(hw->aq.asq_last_status);
+               *errno = i40e_aq_rc_to_posix(status, hw->aq.asq_last_status);
        }
 
        return status;
@@ -909,7 +918,7 @@ static i40e_status i40e_nvmupd_nvm_write(struct i40e_hw *hw,
                i40e_debug(hw, I40E_DEBUG_NVM,
                           "i40e_nvmupd_nvm_write status %d aq %d\n",
                           status, hw->aq.asq_last_status);
-               *errno = i40e_aq_rc_to_posix(hw->aq.asq_last_status);
+               *errno = i40e_aq_rc_to_posix(status, hw->aq.asq_last_status);
        }
 
        return status;

diff --git a/drivers/net/ethernet/intel/i40evf/i40e_adminq.h b/drivers/net/ethernet/intel/i40evf/i40e_adminq.h
index 0ffb8d16c63a38fd78c9cb5ce6cd0fc1719ec67b..6c31bf22c2c31f88e996a402c2a4156cd9239f99 100644 (file)
--- a/drivers/net/ethernet/intel/i40evf/i40e_adminq.h
+++ b/drivers/net/ethernet/intel/i40evf/i40e_adminq.h
@@ -28,6 +28,7 @@
 #define _I40E_ADMINQ_H_
 
 #include "i40e_osdep.h"
+#include "i40e_status.h"
 #include "i40e_adminq_cmd.h"
 
 #define I40E_ADMINQ_DESC(R, i)   \
@@ -108,7 +109,7 @@ struct i40e_adminq_info {
  * i40e_aq_rc_to_posix - convert errors to user-land codes
  * aq_rc: AdminQ error code to convert
  **/
-static inline int i40e_aq_rc_to_posix(u16 aq_rc)
+static inline int i40e_aq_rc_to_posix(u32 aq_ret, u16 aq_rc)
 {
        int aq_to_posix[] = {
                0,           /* I40E_AQ_RC_OK */
@@ -136,6 +137,10 @@ static inline int i40e_aq_rc_to_posix(u16 aq_rc)
                -EFBIG,      /* I40E_AQ_RC_EFBIG */
        };
 
+       /* aq_rc is invalid if AQ timed out */
+       if (aq_ret == I40E_ERR_ADMIN_QUEUE_TIMEOUT)
+               return -EAGAIN;
+
        if (aq_rc >= ARRAY_SIZE(aq_to_posix))
                return -ERANGE;
        return aq_to_posix[aq_rc];