This is a note to let you know that I've just added the patch titled
serial: PL011: move interrupt clearing
to my tty git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git
in the tty-linus branch.
The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)
The patch will hopefully also will be merged in Linus's tree for the
next -rc kernel release.
If you have any questions about this process, please let me know.
>From c3d8b76f61586714cdc5f219ba45592a54caaa55 Mon Sep 17 00:00:00 2001
From: Linus Walleij <[email protected]>
Date: Wed, 21 Mar 2012 20:15:18 +0100
Subject: serial: PL011: move interrupt clearing
Commit 360f748b204275229f8398cb2f9f53955db1503b
"serial: PL011: clear pending interrupts"
attempts to clear interrupts by writing to a
yet-unassigned memory address. This fixes the issue.
The breaking patch is marked for stable so should be
carried along with the other patch.
Cc: Shreshtha Kumar Sahu <[email protected]>
Cc: Russell King <[email protected]>
Cc: stable <[email protected]>
Cc: Nicolas Pitre <[email protected]>
Reported-by: Viresh Kumar <[email protected]>
Signed-off-by: Linus Walleij <[email protected]>
Tested-by: Grant Likely <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/tty/serial/amba-pl011.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index 0c65c9e..3d569cd 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -1946,10 +1946,6 @@ static int pl011_probe(struct amba_device *dev, const
struct amba_id *id)
goto unmap;
}
- /* Ensure interrupts from this UART are masked and cleared */
- writew(0, uap->port.membase + UART011_IMSC);
- writew(0xffff, uap->port.membase + UART011_ICR);
-
uap->vendor = vendor;
uap->lcrh_rx = vendor->lcrh_rx;
uap->lcrh_tx = vendor->lcrh_tx;
@@ -1967,6 +1963,10 @@ static int pl011_probe(struct amba_device *dev, const
struct amba_id *id)
uap->port.line = i;
pl011_dma_probe(uap);
+ /* Ensure interrupts from this UART are masked and cleared */
+ writew(0, uap->port.membase + UART011_IMSC);
+ writew(0xffff, uap->port.membase + UART011_ICR);
+
snprintf(uap->type, sizeof(uap->type), "PL011 rev%u", amba_rev(dev));
amba_ports[i] = uap;
--
1.7.10.rc3.1.gb3065
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