This is a note to let you know that I've just added the patch titled
PCI: keystone: Fix MSI code that retrieves struct pcie_port pointer
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pci-keystone-fix-msi-code-that-retrieves-struct-pcie_port-pointer.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 79e3f4a853ed161cd4c06d84b50beebf961a47c6 Mon Sep 17 00:00:00 2001
From: Murali Karicheri <m-karicheri2@xxxxxx>
Date: Mon, 29 Feb 2016 17:18:22 -0600
Subject: PCI: keystone: Fix MSI code that retrieves struct pcie_port pointer
From: Murali Karicheri <m-karicheri2@xxxxxx>
commit 79e3f4a853ed161cd4c06d84b50beebf961a47c6 upstream.
Commit cbce7900598c ("PCI: designware: Make driver arch-agnostic") changed
the host bridge sysdata pointer from the ARM pci_sys_data to the DesignWare
pcie_port structure, and changed pcie-designware.c to reflect that. But it
did not change the corresponding code in pci-keystone-dw.c, so it caused
crashes on Keystone:
Unable to handle kernel NULL pointer dereference at virtual address 00000030
pgd = c0003000
[00000030] *pgd=80000800004003, *pmd=00000000
Internal error: Oops: 206 [#1] PREEMPT SMP ARM
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.4.2-00139-gb74f926 #2
Hardware name: Keystone
PC is at ks_dw_pcie_msi_irq_unmask+0x24/0x58
Change pci-keystone-dw.c to expect sysdata to be the struct pcie_port
pointer.
[bhelgaas: changelog]
Fixes: cbce7900598c ("PCI: designware: Make driver arch-agnostic")
Signed-off-by: Murali Karicheri <m-karicheri2@xxxxxx>
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
CC: Zhou Wang <wangzhou1@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/pci/host/pci-keystone-dw.c | 11 +++--------
1 file changed, 3 insertions(+), 8 deletions(-)
--- a/drivers/pci/host/pci-keystone-dw.c
+++ b/drivers/pci/host/pci-keystone-dw.c
@@ -58,11 +58,6 @@
#define to_keystone_pcie(x) container_of(x, struct keystone_pcie, pp)
-static inline struct pcie_port *sys_to_pcie(struct pci_sys_data *sys)
-{
- return sys->private_data;
-}
-
static inline void update_reg_offset_bit_pos(u32 offset, u32 *reg_offset,
u32 *bit_pos)
{
@@ -108,7 +103,7 @@ static void ks_dw_pcie_msi_irq_ack(struc
struct pcie_port *pp;
msi = irq_data_get_msi_desc(d);
- pp = sys_to_pcie(msi_desc_to_pci_sysdata(msi));
+ pp = (struct pcie_port *) msi_desc_to_pci_sysdata(msi);
ks_pcie = to_keystone_pcie(pp);
offset = d->irq - irq_linear_revmap(pp->irq_domain, 0);
update_reg_offset_bit_pos(offset, ®_offset, &bit_pos);
@@ -146,7 +141,7 @@ static void ks_dw_pcie_msi_irq_mask(stru
u32 offset;
msi = irq_data_get_msi_desc(d);
- pp = sys_to_pcie(msi_desc_to_pci_sysdata(msi));
+ pp = (struct pcie_port *) msi_desc_to_pci_sysdata(msi);
ks_pcie = to_keystone_pcie(pp);
offset = d->irq - irq_linear_revmap(pp->irq_domain, 0);
@@ -167,7 +162,7 @@ static void ks_dw_pcie_msi_irq_unmask(st
u32 offset;
msi = irq_data_get_msi_desc(d);
- pp = sys_to_pcie(msi_desc_to_pci_sysdata(msi));
+ pp = (struct pcie_port *) msi_desc_to_pci_sysdata(msi);
ks_pcie = to_keystone_pcie(pp);
offset = d->irq - irq_linear_revmap(pp->irq_domain, 0);
Patches currently in stable-queue which might be from m-karicheri2@xxxxxx are
queue-4.4/pci-keystone-fix-msi-code-that-retrieves-struct-pcie_port-pointer.patch
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