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[intelxl] Allow expected admin queue command errors to be silenced 

The "clear PXE mode" admin queue command will return an EEXIST error
if the device is already in non-PXE mode, but there is no other admin
queue command that can be used to determine whether the device has
already been switched into non-PXE mode.

Provide a mechanism to allow expected errors from a command to be
silenced, to allow the "clear PXE mode" command to be cleanly used
without needing to first check the GLLAN_RCTL_0 register value.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
pull/697/head^2
Michael Brown 2022-03-17 13:01:50 +00:00
parent f0ea19b238
commit faf26bf8b8
1 changed files with 7 additions and 3 deletions
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10
src/drivers/net/intelxl.c
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@ -348,6 +348,7 @@ int intelxl_admin_command ( struct intelxl_nic *intelxl ) {
union intelxl_admin_buffer *buf;
uint64_t address;
uint32_t cookie;
uint16_t silence;
unsigned int index;
unsigned int tail;
unsigned int i;
@ -364,11 +365,14 @@ int intelxl_admin_command ( struct intelxl_nic *intelxl ) {
DBGC2 ( intelxl, "/%#08x", le32_to_cpu ( cmd->cookie ) );
DBGC2 ( intelxl, ":\n" );
/* Allow expected errors to be silenced */
silence = cmd->ret;
cmd->ret = 0;
/* Sanity checks */
assert ( ! ( cmd->flags & cpu_to_le16 ( INTELXL_ADMIN_FL_DD ) ) );
assert ( ! ( cmd->flags & cpu_to_le16 ( INTELXL_ADMIN_FL_CMP ) ) );
assert ( ! ( cmd->flags & cpu_to_le16 ( INTELXL_ADMIN_FL_ERR ) ) );
assert ( cmd->ret == 0 );
/* Populate data buffer address if applicable */
if ( cmd->flags & cpu_to_le16 ( INTELXL_ADMIN_FL_BUF ) ) {
@ -419,8 +423,8 @@ int intelxl_admin_command ( struct intelxl_nic *intelxl ) {
goto err;
}
/* Check for errors */
if ( cmd->ret != 0 ) {
/* Check for unexpected errors */
if ( ( cmd->ret != 0 ) && ( cmd->ret != silence ) ) {
DBGC ( intelxl, "INTELXL %p admin command %#x error "
"%d\n", intelxl, index,
le16_to_cpu ( cmd->ret ) );