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MIPS: Netlogic: Disable writing IRT for disabled blocks

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If the device header of a block is not present, return invalid IRT
value so that we do not program an incorrect offset.

Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8882/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Jayachandran C 2015-01-07 16:58:25 +05:30 committed by Ralf Baechle
parent 9bbc6c7d35
commit 72e0605b43
1 changed files with 16 additions and 9 deletions
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25
arch/mips/netlogic/xlp/nlm_hal.c
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@ -170,16 +170,23 @@ static int xlp_irq_to_irt(int irq)
}
if (devoff != 0) {
uint32_t val;
pcibase = nlm_pcicfg_base(devoff);
irt = nlm_read_reg(pcibase, XLP_PCI_IRTINFO_REG) & 0xffff;
/* HW weirdness, I2C IRT entry has to be fixed up */
switch (irq) {
case PIC_I2C_1_IRQ:
irt = irt + 1; break;
case PIC_I2C_2_IRQ:
irt = irt + 2; break;
case PIC_I2C_3_IRQ:
irt = irt + 3; break;
val = nlm_read_reg(pcibase, XLP_PCI_IRTINFO_REG);
if (val == 0xffffffff) {
irt = -1;
} else {
irt = val & 0xffff;
/* HW weirdness, I2C IRT entry has to be fixed up */
switch (irq) {
case PIC_I2C_1_IRQ:
irt = irt + 1; break;
case PIC_I2C_2_IRQ:
irt = irt + 2; break;
case PIC_I2C_3_IRQ:
irt = irt + 3; break;
}
}
} else if (irq >= PIC_PCIE_LINK_LEGACY_IRQ(0) &&
irq <= PIC_PCIE_LINK_LEGACY_IRQ(3)) {