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Commit 367dc4b7 authored by Krzysztof Hałasa's avatar Krzysztof Hałasa Committed by Arnd Bergmann
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CNS3xxx: Fix PCIe read size limit. 



Max_Read_Request_Size is 3 bits wide, not 2 bits.
Also fix the message.

Signed-off-by: default avatarKrzysztof Hałasa <khalasa@piap.pl>
Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
parent defaa4d1

arch/arm/mach-cns3xxx/pcie.c

+9 −6
Original line number Diff line number Diff line
@@ -299,12 +299,15 @@ static void __init cns3xxx_pcie_hw_init(struct cns3xxx_pcie *cnspci) 
	devfn = PCI_DEVFN(0, 0);

	pos = pci_bus_find_capability(&bus, devfn, PCI_CAP_ID_EXP);

	pci_bus_read_config_word(&bus, devfn, pos + PCI_EXP_DEVCTL, &dc);

	dc &= ~(0x3 << 12);	/* Clear Device Control Register [14:12] */

	if (dc & PCI_EXP_DEVCTL_READRQ) {

		dc &= ~PCI_EXP_DEVCTL_READRQ;

		pci_bus_write_config_word(&bus, devfn, pos + PCI_EXP_DEVCTL, dc);

		pci_bus_read_config_word(&bus, devfn, pos + PCI_EXP_DEVCTL, &dc);

	if (!(dc & (0x3 << 12)))

		pr_info("PCIe: Set Device Max_Read_Request_Size to 128 byte\n");



		if (dc & PCI_EXP_DEVCTL_READRQ)

			pr_warn("PCIe: Unable to set device Max_Read_Request_Size\n");

		else

			pr_info("PCIe: Max_Read_Request_Size set to 128 bytes\n");

	}

	/* Disable PCIe0 Interrupt Mask INTA to INTD */

	__raw_writel(~0x3FFF, MISC_PCIE_INT_MASK(port));

}