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authorLinus Walleij <linus.walleij@linaro.org>2012-03-21 20:15:18 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-04-22 15:31:11 -0700
commit2d31dab4dc5754f3f0ddc40f607ba19928e4dd82 (patch)
tree6eb3038c04e1e0bb106b504569ee0ed5941ed6d6 /drivers/tty
parentdc39a21db504923b95cf2db14280a5105a296c36 (diff)
serial: PL011: move interrupt clearing
commit c3d8b76f61586714cdc5f219ba45592a54caaa55 upstream. 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 <shreshthakumar.sahu@stericsson.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Nicolas Pitre <nico@fluxnic.net> Reported-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/serial/amba-pl011.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index dddc3f27b68..6da8cf85edc 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -1919,10 +1919,6 @@ 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;
@@ -1939,6 +1935,10 @@ 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;