fsl: serdes: ensure accessing the initialized maps of serdes protocol

Up to now, the function is_serdes_configed() doesn't check if the map
of serdes protocol is initialized before accessing it. The function
is_serdes_configed() will get wrong result when it was called before
the serdes protocol maps initialized. As the first element of the map
isn't used for any device, so use it as the flag to indicate if the
map has been initialized.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/arch/arm/include/asm/arch-fsl-layerscape/fsl_serdes.h b/arch/arm/include/asm/arch-fsl-layerscape/fsl_serdes.h
index e1b3f44d853..9f94b4505e0 100644
--- a/arch/arm/include/asm/arch-fsl-layerscape/fsl_serdes.h
+++ b/arch/arm/include/asm/arch-fsl-layerscape/fsl_serdes.h
@@ -11,6 +11,10 @@
 
 #ifdef CONFIG_LS2080A
 enum srds_prtcl {
+	/*
+	 * Nobody will check whether the device 'NONE' has been configured,
+	 * So use it to indicate if the serdes_prtcl_map has been initialized.
+	 */
 	NONE = 0,
 	PCIE1,
 	PCIE2,
@@ -57,6 +61,10 @@ enum srds {
 };
 #elif defined(CONFIG_FSL_LSCH2)
 enum srds_prtcl {
+	/*
+	 * Nobody will check whether the device 'NONE' has been configured,
+	 * So use it to indicate if the serdes_prtcl_map has been initialized.
+	 */
 	NONE = 0,
 	PCIE1,
 	PCIE2,