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| author | Grant Likely <grant.likely@linaro.org> | 2013-11-01 10:50:50 -0700 |
|---|---|---|
| committer | Grant Likely <grant.likely@linaro.org> | 2013-11-03 23:16:35 +0000 |
| commit | 78119fd1068cc068f6112a57a5f6de0e5b20245a (patch) | |
| tree | 8e0726dc0a7527c0e7f571c7953e3115c7bded7f /drivers/of/irq.c | |
| parent | 0976c946a610d06e907335b7a3afa6db046f8e1b (diff) | |
| download | linux-78119fd1068cc068f6112a57a5f6de0e5b20245a.tar.gz | |
of/irq: Fix bug in interrupt parsing refactor.
Commit 2361613206e6, "of/irq: Refactor interrupt-map parsing" introduced a bug. The irq parsing will fail for some nodes that don't have a reg property. It is fixed by deferring the check for reg until it is actually needed. Also adjust the testcase data to catch the bug. Signed-off-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Warren <swarren@nvidia.com> Tested-by: Ming Lei <tom.leiming@gmail.com> Tested-by: Stephen Warren <swarren@nvidia.com> Cc: Rob Herring <rob.herring@calxeda.com>
Diffstat (limited to 'drivers/of/irq.c')
| -rw-r--r-- | drivers/of/irq.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/drivers/of/irq.c b/drivers/of/irq.c index 8cc62b4a7988..52dba6a01423 100644 --- a/drivers/of/irq.c +++ b/drivers/of/irq.c @@ -147,18 +147,9 @@ int of_irq_parse_raw(const __be32 *addr, struct of_phandle_args *out_irq) pr_debug(" -> addrsize=%d\n", addrsize); - /* If we were passed no "reg" property and we attempt to parse - * an interrupt-map, then #address-cells must be 0. - * Fail if it's not. - */ - if (addr == NULL && addrsize != 0) { - pr_debug(" -> no reg passed in when needed !\n"); - return -EINVAL; - } - /* Precalculate the match array - this simplifies match loop */ for (i = 0; i < addrsize; i++) - initial_match_array[i] = addr[i]; + initial_match_array[i] = addr ? addr[i] : 0; for (i = 0; i < intsize; i++) initial_match_array[addrsize + i] = cpu_to_be32(out_irq->args[i]); @@ -174,6 +165,15 @@ int of_irq_parse_raw(const __be32 *addr, struct of_phandle_args *out_irq) return 0; } + /* + * interrupt-map parsing does not work without a reg + * property when #address-cells != 0 + */ + if (addrsize && !addr) { + pr_debug(" -> no reg passed in when needed !\n"); + goto fail; + } + /* Now look for an interrupt-map */ imap = of_get_property(ipar, "interrupt-map", &imaplen); /* No interrupt map, check for an interrupt parent */ |