+ serial-z85c30-bcm1480-loops-reach-1.patch added to -mm tree

[akpm@linux-foundation.org]

The patch titled
     serial: Z85C30: BCM1480: loops reach -1
has been added to the -mm tree.  Its filename is
     serial-z85c30-bcm1480-loops-reach-1.patch

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------------------------------------------------------
Subject: serial: Z85C30: BCM1480: loops reach -1
From: Roel Kluin <roel.kluin@gmail.com>

With a postfix decrement 'loops' reaches -1, which is subsequently
returned.  In drivers/serial/zs.c, line 1137 it is considered as a boolean
with 0 as failure:

if (zs_transmit_drain(zport, irq))
                write_zsdata(zport, ch);

so to use it as such loops should end at 0 after the loop rather than -1.
This also fixes similar loops in other functions.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Cc: "Maciej W. Rozycki" <macro@linux-mips.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/serial/sb1250-duart.c |    6 +++---
 drivers/serial/zs.c           |    6 +++---
 2 files changed, 6 insertions(+), 6 deletions(-)

diff -puN drivers/serial/sb1250-duart.c~serial-z85c30-bcm1480-loops-reach-1 drivers/serial/sb1250-duart.c
--- a/drivers/serial/sb1250-duart.c~serial-z85c30-bcm1480-loops-reach-1
+++ a/drivers/serial/sb1250-duart.c
@@ -204,7 +204,7 @@ static int sbd_receive_drain(struct sbd_
 {
 	int loops = 10000;
 
-	while (sbd_receive_ready(sport) && loops--)
+	while (sbd_receive_ready(sport) && --loops)
 		read_sbdchn(sport, R_DUART_RX_HOLD);
 	return loops;
 }
@@ -218,7 +218,7 @@ static int __maybe_unused sbd_transmit_d
 {
 	int loops = 10000;
 
-	while (!sbd_transmit_ready(sport) && loops--)
+	while (!sbd_transmit_ready(sport) && --loops)
 		udelay(2);
 	return loops;
 }
@@ -232,7 +232,7 @@ static int sbd_line_drain(struct sbd_por
 {
 	int loops = 10000;
 
-	while (!sbd_transmit_empty(sport) && loops--)
+	while (!sbd_transmit_empty(sport) && --loops)
 		udelay(2);
 	return loops;
 }
diff -puN drivers/serial/zs.c~serial-z85c30-bcm1480-loops-reach-1 drivers/serial/zs.c
--- a/drivers/serial/zs.c~serial-z85c30-bcm1480-loops-reach-1
+++ a/drivers/serial/zs.c
@@ -231,7 +231,7 @@ static int zs_receive_drain(struct zs_po
 {
 	int loops = 10000;
 
-	while ((read_zsreg(zport, R0) & Rx_CH_AV) && loops--)
+	while ((read_zsreg(zport, R0) & Rx_CH_AV) && --loops)
 		read_zsdata(zport);
 	return loops;
 }
@@ -241,7 +241,7 @@ static int zs_transmit_drain(struct zs_p
 	struct zs_scc *scc = zport->scc;
 	int loops = 10000;
 
-	while (!(read_zsreg(zport, R0) & Tx_BUF_EMP) && loops--) {
+	while (!(read_zsreg(zport, R0) & Tx_BUF_EMP) && --loops) {
 		zs_spin_unlock_cond_irq(&scc->zlock, irq);
 		udelay(2);
 		zs_spin_lock_cond_irq(&scc->zlock, irq);
@@ -254,7 +254,7 @@ static int zs_line_drain(struct zs_port 
 	struct zs_scc *scc = zport->scc;
 	int loops = 10000;
 
-	while (!(read_zsreg(zport, R1) & ALL_SNT) && loops--) {
+	while (!(read_zsreg(zport, R1) & ALL_SNT) && --loops) {
 		zs_spin_unlock_cond_irq(&scc->zlock, irq);
 		udelay(2);
 		zs_spin_lock_cond_irq(&scc->zlock, irq);
_

Patches currently in -mm which might be from roel.kluin@gmail.com are

linux-next.patch
drm-fix-lock_test_with_return-macro.patch
pata-rb532-cf-platform_get_irq-failure-ignored.patch
uwb-event_size-should-be-signed.patch
scsi-ncr53c8xx-div-reaches-1.patch
scsi-pcmcia-nsp_cs-time_out-reaches-1.patch
frv-duplicate-output_buffer-of-e03.patch
frv-duplicate-output_buffer-of-e03-checkpatch-fixes.patch
m68k-count-can-reach-51-not-50.patch
bfin_5xx-misplaced-parentheses.patch
serial-z85c30-bcm1480-loops-reach-1.patch
ufs-sector_t-cannot-be-negative.patch