The driver takes into account not only the interrupt status bit but also "FIFO
empty" bit in its test_irq() method. This actually is a superfluous check since
for the DMA commands calling the dma_test_irq() method further in the interrupt
handler makes sure FIFO is emptied.
Signed-off-by: Sergei Shtylyov <sshtylyov@xxxxxxxxxxxxx>
---
The patch is atop of ide-2.6.git tree...
Russell, would you mind giving this patch a test?
drivers/ide/pdc202xx_old.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
Index: ide-2.6/drivers/ide/pdc202xx_old.c
===================================================================
--- ide-2.6.orig/drivers/ide/pdc202xx_old.c
+++ ide-2.6/drivers/ide/pdc202xx_old.c
@@ -93,13 +93,13 @@ static int pdc202xx_test_irq(ide_hwif_t
* bit 7: error, bit 6: interrupting,
* bit 5: FIFO full, bit 4: FIFO empty
*/
- return ((sc1d & 0x50) == 0x50) ? 1 : 0;
+ return (sc1d & 0x40) ? 1 : 0;
} else {
/*
* bit 3: error, bit 2: interrupting,
* bit 1: FIFO full, bit 0: FIFO empty
*/
- return ((sc1d & 0x05) == 0x05) ? 1 : 0;
+ return (sc1d & 0x04) ? 1 : 0;
}
}
--
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