Commit 671ee7f0 authored by Liu Gang-B34182's avatar Liu Gang-B34182 Committed by Linus Torvalds

arch/powerpc/sysdev/fsl_rio.c: correct IECSR register clear value

This bug causes the IECSR register clear failure.  In this case, the RETE
(retry error threshold exceeded) interrupt will be generated and cannot be
cleared.  So the related ISR may be called persistently.

The RETE bit in IECSR is cleared by writing a 1 to it.
Signed-off-by: default avatarLiu Gang <>
Cc: Benjamin Herrenschmidt <>
Cc: Kumar Gala <>
Cc: <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent 62d17601
......@@ -54,6 +54,7 @@
#define ODSR_CLEAR 0x1c00
#define ESCSR_CLEAR 0x07120204
#define IECSR_CLEAR 0x80000000
#define RIO_PORT1_EDCSR 0x0640
#define RIO_PORT2_EDCSR 0x0680
......@@ -1089,11 +1090,11 @@ static void port_error_handler(struct rio_mport *port, int offset)
if (offset == 0) {
out_be32((u32 *)(rio_regs_win + RIO_PORT1_EDCSR), 0);
out_be32((u32 *)(rio_regs_win + RIO_PORT1_IECSR), 0);
out_be32((u32 *)(rio_regs_win + RIO_PORT1_IECSR), IECSR_CLEAR);
out_be32((u32 *)(rio_regs_win + RIO_ESCSR), ESCSR_CLEAR);
} else {
out_be32((u32 *)(rio_regs_win + RIO_PORT2_EDCSR), 0);
out_be32((u32 *)(rio_regs_win + RIO_PORT2_IECSR), 0);
out_be32((u32 *)(rio_regs_win + RIO_PORT2_IECSR), IECSR_CLEAR);
out_be32((u32 *)(rio_regs_win + RIO_PORT2_ESCSR), ESCSR_CLEAR);
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment