From: David Daney Date: Thu, 17 Feb 2011 22:47:52 +0000 (-0800) Subject: MIPS: Octeon: Don't request interrupts for unused IPI mailbox bits. X-Git-Tag: upstream/snapshot3+hdmi~10420^2~2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e650ce0f083ff9354a10ad66e6bf8c193e8a2755;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git MIPS: Octeon: Don't request interrupts for unused IPI mailbox bits. We only use the three low-order mailbox bits. Leave the upper bits alone for possible use by drivers and other software. Signed-off-by: David Daney To: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2090/ Signed-off-by: Ralf Baechle --- diff --git a/arch/mips/cavium-octeon/smp.c b/arch/mips/cavium-octeon/smp.c index ba78b21..716fae6 100644 --- a/arch/mips/cavium-octeon/smp.c +++ b/arch/mips/cavium-octeon/smp.c @@ -37,7 +37,7 @@ static irqreturn_t mailbox_interrupt(int irq, void *dev_id) uint64_t action; /* Load the mailbox register to figure out what we're supposed to do */ - action = cvmx_read_csr(CVMX_CIU_MBOX_CLRX(coreid)); + action = cvmx_read_csr(CVMX_CIU_MBOX_CLRX(coreid)) & 0xffff; /* Clear the mailbox to clear the interrupt */ cvmx_write_csr(CVMX_CIU_MBOX_CLRX(coreid), action); @@ -200,16 +200,15 @@ void octeon_prepare_cpus(unsigned int max_cpus) if (labi->labi_signature != LABI_SIGNATURE) panic("The bootloader version on this board is incorrect."); #endif - - cvmx_write_csr(CVMX_CIU_MBOX_CLRX(cvmx_get_core_num()), 0xffffffff); + /* + * Only the low order mailbox bits are used for IPIs, leave + * the other bits alone. + */ + cvmx_write_csr(CVMX_CIU_MBOX_CLRX(cvmx_get_core_num()), 0xffff); if (request_irq(OCTEON_IRQ_MBOX0, mailbox_interrupt, IRQF_DISABLED, - "mailbox0", mailbox_interrupt)) { + "SMP-IPI", mailbox_interrupt)) { panic("Cannot request_irq(OCTEON_IRQ_MBOX0)\n"); } - if (request_irq(OCTEON_IRQ_MBOX1, mailbox_interrupt, IRQF_DISABLED, - "mailbox1", mailbox_interrupt)) { - panic("Cannot request_irq(OCTEON_IRQ_MBOX1)\n"); - } } /**