Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=11d1a62c596023991e860f1814aacb12a5169aa9
Commit:     11d1a62c596023991e860f1814aacb12a5169aa9
Parent:     8d74c1fdaaea34b56c1dffe2c79f64d2c53c11b1
Author:     Krzysztof Helt <[EMAIL PROTECTED]>
AuthorDate: Wed May 23 13:57:47 2007 -0700
Committer:  Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Wed May 23 20:14:13 2007 -0700

    pm2fb: RDAC_WR barriers clean up
    
    This patch fixes a possible barriers problem in RDAC_WR functions, then
    remove redudant ones.
    
    It also removes one unneeded register load from blitter function().
    
    Signed-off-by: Krzysztof.Helt <[EMAIL PROTECTED]>
    Signed-off-by: Antonino Daplas <[EMAIL PROTECTED]>
    Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
    Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
 drivers/video/pm2fb.c |   17 +++++------------
 1 files changed, 5 insertions(+), 12 deletions(-)

diff --git a/drivers/video/pm2fb.c b/drivers/video/pm2fb.c
index ab5e668..0a04483 100644
--- a/drivers/video/pm2fb.c
+++ b/drivers/video/pm2fb.c
@@ -183,15 +183,17 @@ static inline void pm2_RDAC_WR(struct pm2fb_par* p, s32 
idx, u32 v)
                index = PM2VR_RD_INDEXED_DATA;
                break;
        }       
-       mb();
+       wmb();
        pm2_WR(p, index, v);
+       wmb();
 }
 
 static inline void pm2v_RDAC_WR(struct pm2fb_par* p, s32 idx, u32 v)
 {
        pm2_WR(p, PM2VR_RD_INDEX_LOW, idx & 0xff);
-       mb();
+       wmb();
        pm2_WR(p, PM2VR_RD_INDEXED_DATA, v);
+       wmb();
 }
 
 #ifdef CONFIG_FB_PM2_FIFO_DISCONNECT
@@ -466,11 +468,9 @@ static void set_memclock(struct pm2fb_par* par, u32 clk)
                WAIT_FIFO(par, 8);
                pm2_WR(par, PM2VR_RD_INDEX_HIGH, PM2VI_RD_MCLK_CONTROL >> 8);
                pm2v_RDAC_WR(par, PM2VI_RD_MCLK_CONTROL, 0);
-               wmb();
                pm2v_RDAC_WR(par, PM2VI_RD_MCLK_PRESCALE, m);
                pm2v_RDAC_WR(par, PM2VI_RD_MCLK_FEEDBACK, n);
                pm2v_RDAC_WR(par, PM2VI_RD_MCLK_POSTSCALE, p);
-               wmb();
                pm2v_RDAC_WR(par, PM2VI_RD_MCLK_CONTROL, 1);
                rmb();
                for (i = 256;
@@ -483,12 +483,9 @@ static void set_memclock(struct pm2fb_par* par, u32 clk)
                pm2_mnp(clk, &m, &n, &p);
                WAIT_FIFO(par, 10);
                pm2_RDAC_WR(par, PM2I_RD_MEMORY_CLOCK_3, 6);
-               wmb();
                pm2_RDAC_WR(par, PM2I_RD_MEMORY_CLOCK_1, m);
                pm2_RDAC_WR(par, PM2I_RD_MEMORY_CLOCK_2, n);
-               wmb();
                pm2_RDAC_WR(par, PM2I_RD_MEMORY_CLOCK_3, 8|p);
-               wmb();
                pm2_RDAC_RD(par, PM2I_RD_MEMORY_CLOCK_STATUS);
                rmb();
                for (i = 256;
@@ -509,12 +506,9 @@ static void set_pixclock(struct pm2fb_par* par, u32 clk)
                pm2_mnp(clk, &m, &n, &p);
                WAIT_FIFO(par, 8);
                pm2_RDAC_WR(par, PM2I_RD_PIXEL_CLOCK_A3, 0);
-               wmb();
                pm2_RDAC_WR(par, PM2I_RD_PIXEL_CLOCK_A1, m);
                pm2_RDAC_WR(par, PM2I_RD_PIXEL_CLOCK_A2, n);
-               wmb();
                pm2_RDAC_WR(par, PM2I_RD_PIXEL_CLOCK_A3, 8|p);
-               wmb();
                pm2_RDAC_RD(par, PM2I_RD_PIXEL_CLOCK_STATUS);
                rmb();
                for (i = 256;
@@ -1066,10 +1060,9 @@ static void pm2fb_block_op(struct fb_info* info, int 
copy,
 
        if (!w || !h)
                return;
-       WAIT_FIFO(par, 6);
+       WAIT_FIFO(par, 5);
        pm2_WR(par, PM2R_CONFIG, PM2F_CONFIG_FB_WRITE_ENABLE |
                PM2F_CONFIG_FB_READ_SOURCE_ENABLE);
-       pm2_WR(par, PM2R_FB_PIXEL_OFFSET, 0);
        if (copy)
                pm2_WR(par, PM2R_FB_SOURCE_DELTA,
                        ((ysrc-y) & 0xfff) << 16 | ((xsrc-x) & 0xfff));
-
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