The patch titled
serial: clear proper MPSC interrupt cause bits
has been removed from the -mm tree. Its filename was
serial-clear-proper-mpsc-interrupt-cause-bits.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: serial: clear proper MPSC interrupt cause bits
From: Jay Lubomirski <jaylubo@xxxxxxxxxxxx>
The interrupt clearing code in mpsc_sdma_intr_ack() mistakenly clears the
interrupt for both controllers instead of just the one its supposed to.
This can result in the other controller appearing to hang because its
interrupt was effectively lost.
So, don't clear the interrupt cause bits for both MPSC controllers when
clearing the interrupt for one of them. Just clear the one that is
supposed to be cleared.
Signed-off-by: Jay Lubomirski <jaylubo@xxxxxxxxxxxx>
Acked-by: Mark A. Greer <mgreer@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/serial/mpsc.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletion(-)
diff -puN drivers/serial/mpsc.c~serial-clear-proper-mpsc-interrupt-cause-bits drivers/serial/mpsc.c
--- a/drivers/serial/mpsc.c~serial-clear-proper-mpsc-interrupt-cause-bits
+++ a/drivers/serial/mpsc.c
@@ -503,7 +503,8 @@ mpsc_sdma_intr_ack(struct mpsc_port_info
if (pi->mirror_regs)
pi->shared_regs->SDMA_INTR_CAUSE_m = 0;
- writel(0, pi->shared_regs->sdma_intr_base + SDMA_INTR_CAUSE);
+ writeb(0x00, pi->shared_regs->sdma_intr_base + SDMA_INTR_CAUSE +
+ pi->port.line);
return;
}
_
Patches currently in -mm which might be from jaylubo@xxxxxxxxxxxx are
origin.patch
-
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