[PATCH 2/2] ieee1934: dv1394 interrupt enabling/disabling broken on big-endian

Harvey Harrison
2008-12-13T23:21:42Z

After annotating the frame structs, this was left:
drivers/ieee1394/dv1394.c:2113:23: warning: invalid assignment: |=
drivers/ieee1394/dv1394.c:2113:23: left side has type restricted __le32
drivers/ieee1394/dv1394.c:2113:23: right side has type int
drivers/ieee1394/dv1394.c:2121:24: warning: invalid assignment: &=
drivers/ieee1394/dv1394.c:2121:24: left side has type restricted __le32
drivers/ieee1394/dv1394.c:2121:24: right side has type int
drivers/ieee1394/dv1394.c:2123:24: warning: invalid assignment: |=
drivers/ieee1394/dv1394.c:2123:24: left side has type restricted __le32
drivers/ieee1394/dv1394.c:2123:24: right side has type int

Which looks like a real bug on a big-endian arch as it would set/clear
the wrong bit.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
---
drivers/ieee1394/dv1394.c | 8 ++++----
1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/ieee1394/dv1394.c b/drivers/ieee1394/dv1394.c
index f258e61..a329e6b 100644
--- a/drivers/ieee1394/dv1394.c
+++ b/drivers/ieee1394/dv1394.c
@@ -2110,17 +2110,17 @@ static void ir_tasklet_func(unsigned long data)
f = video->frames[next_i / MAX_PACKETS];
next = &(f->descriptor_pool[next_i % MAX_PACKETS]);
next_dma = ((unsigned long) block - (unsigned long) f->descriptor_pool) + f->descriptor_pool_dma;
- next->u.in.il.q[0] |= 3 << 20; /* enable interrupt */
- next->u.in.il.q[2] = 0; /* disable branch */
+ next->u.in.il.q[0] |= cpu_to_le32(3 << 20); /* enable interrupt */
+ next->u.in.il.q[2] = cpu_to_le32(0); /* disable branch */

/* link previous to next */
prev_i = (next_i == 0) ? (MAX_PACKETS * video->n_frames - 1) : (next_i - 1);
f = video->frames[prev_i / MAX_PACKETS];
prev = &(f->descriptor_pool[prev_i % MAX_PACKETS]);
if (prev_i % (MAX_PACKETS/2)) {
- prev->u.in.il.q[0] &= ~(3 << 20); /* no interrupt */
+ prev->u.in.il.q[0] &= ~cpu_to_le32(3 << 20); /* no interrupt */
} else {
- prev->u.in.il.q[0] |= 3 << 20; /* enable interrupt */
+ prev->u.in.il.q[0] |= cpu_to_le32(3 << 20); /* enable interrupt */
}
prev->u.in.il.q[2] = cpu_to_le32(next_dma | 1); /* set Z=1 */
wmb();
--
1.6.1.rc2.306.ge5d5e