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authorGrant Likely <grant.likely@secretlab.ca>2011-05-18 11:19:24 -0600
committerGrant Likely <grant.likely@secretlab.ca>2011-05-18 12:32:23 -0600
commitb1608d69cb804e414d0887140ba08a9398e4e638 (patch)
tree8999cd827e7fb4138ff83f7829d8fdcf44ee653d /arch/sparc/kernel/pci_sabre.c
parent01294d82622d6d9d64bde8e4530c7e2c6dbb6ee6 (diff)
downloadop-kernel-dev-b1608d69cb804e414d0887140ba08a9398e4e638.zip
op-kernel-dev-b1608d69cb804e414d0887140ba08a9398e4e638.tar.gz
drivercore: revert addition of of_match to struct device
Commit b826291c, "drivercore/dt: add a match table pointer to struct device" added an of_match pointer to struct device to cache the of_match_table entry discovered at driver match time. This was unsafe because matching is not an atomic operation with probing a driver. If two or more drivers are attempted to be matched to a driver at the same time, then the cached matching entry pointer could get overwritten. This patch reverts the of_match cache pointer and reworks all users to call of_match_device() directly instead. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'arch/sparc/kernel/pci_sabre.c')
-rw-r--r--arch/sparc/kernel/pci_sabre.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/sparc/kernel/pci_sabre.c b/arch/sparc/kernel/pci_sabre.c
index 948068a..d1840db 100644
--- a/arch/sparc/kernel/pci_sabre.c
+++ b/arch/sparc/kernel/pci_sabre.c
@@ -452,8 +452,10 @@ static void __devinit sabre_pbm_init(struct pci_pbm_info *pbm,
sabre_scan_bus(pbm, &op->dev);
}
+static const struct of_device_id sabre_match[];
static int __devinit sabre_probe(struct platform_device *op)
{
+ const struct of_device_id *match;
const struct linux_prom64_registers *pr_regs;
struct device_node *dp = op->dev.of_node;
struct pci_pbm_info *pbm;
@@ -463,7 +465,8 @@ static int __devinit sabre_probe(struct platform_device *op)
const u32 *vdma;
u64 clear_irq;
- hummingbird_p = op->dev.of_match && (op->dev.of_match->data != NULL);
+ match = of_match_device(sabre_match, &op->dev);
+ hummingbird_p = match && (match->data != NULL);
if (!hummingbird_p) {
struct device_node *cpu_dp;
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