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| author | Manuel Lauss <manuel.lauss@googlemail.com> | 2012-01-21 18:13:15 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2012-07-23 13:53:38 +0100 |
| commit | 6c2be5cf1d4e70e98d995f9c403b5fbe7b5f2a80 (patch) | |
| tree | bc9779db5aa6443289fe8dcedf28ea1308949504 /arch | |
| parent | 278bf05cf68a6e5e965c85217ddc1318d18fcbf7 (diff) | |
| download | linux-6c2be5cf1d4e70e98d995f9c403b5fbe7b5f2a80.tar.gz linux-6c2be5cf1d4e70e98d995f9c403b5fbe7b5f2a80.tar.bz2 linux-6c2be5cf1d4e70e98d995f9c403b5fbe7b5f2a80.zip | |
MIPS: Alchemy: handle db1200 cpld ints as they come in
Remove the loop in the cascade handler and instead unconditionally
handle just the first set interrupt coming from the CPLD.
This gets rid of a lot of spurious interrupts being triggered for
the SMSC91111 ethernet chip especially under high(er) IDE load:
"eth0: spurious interrupt (mask = 0xb3)"
Verified on DB1200 and DB1300.
Signed-off-by: Manuel Lauss <manuel.lauss@googlemail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3288/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/alchemy/devboards/bcsr.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/arch/mips/alchemy/devboards/bcsr.c b/arch/mips/alchemy/devboards/bcsr.c index 1e83ce2e1147..f2039ef2c293 100644 --- a/arch/mips/alchemy/devboards/bcsr.c +++ b/arch/mips/alchemy/devboards/bcsr.c @@ -90,10 +90,7 @@ static void bcsr_csc_handler(unsigned int irq, struct irq_desc *d) unsigned short bisr = __raw_readw(bcsr_virt + BCSR_REG_INTSTAT); disable_irq_nosync(irq); - - for ( ; bisr; bisr &= bisr - 1) - generic_handle_irq(bcsr_csc_base + __ffs(bisr)); - + generic_handle_irq(bcsr_csc_base + __ffs(bisr)); enable_irq(irq); } |