Commit-ID: e4084a16bbe07957811c75dfb7c9bf25c5862ba0
Gitweb: http://git.kernel.org/tip/e4084a16bbe07957811c75dfb7c9bf25c5862ba0
Author: Marc Zyngier <marc.zyngier@xxxxxxx>
AuthorDate: Sun, 13 Sep 2015 13:37:03 +0100
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Tue, 15 Sep 2015 17:06:29 +0200
platform-msi: Do not cache msi_desc in handler_data
The current implementation of platform MSI caches the msi_desc
pointer in irq_data::handler_data. This is a bit silly, as
we also have irq_data::msi_desc, which is perfectly valid.
Remove the useless assignment and simplify the whole flow.
Reported-by: Ma Jun <majun258@xxxxxxxxxx>
Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
Reviewed-by: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1442147824-20971-1-git-send-email-marc.zyngier@xxxxxxx
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
drivers/base/platform-msi.c | 18 +++---------------
1 file changed, 3 insertions(+), 15 deletions(-)
diff --git a/drivers/base/platform-msi.c b/drivers/base/platform-msi.c
index 1857a5d..134483d 100644
--- a/drivers/base/platform-msi.c
+++ b/drivers/base/platform-msi.c
@@ -63,20 +63,8 @@ static int platform_msi_init(struct irq_domain *domain,
unsigned int virq, irq_hw_number_t hwirq,
msi_alloc_info_t *arg)
{
- struct irq_data *data;
-
- irq_domain_set_hwirq_and_chip(domain, virq, hwirq,
- info->chip, info->chip_data);
-
- /*
- * Save the MSI descriptor in handler_data so that the
- * irq_write_msi_msg callback can retrieve it (and the
- * associated device).
- */
- data = irq_domain_get_irq_data(domain, virq);
- data->handler_data = arg->desc;
-
- return 0;
+ return irq_domain_set_hwirq_and_chip(domain, virq, hwirq,
+ info->chip, info->chip_data);
}
#else
#define platform_msi_set_desc NULL
@@ -97,7 +85,7 @@ static void platform_msi_update_dom_ops(struct msi_domain_info *info)
static void platform_msi_write_msg(struct irq_data *data, struct msi_msg *msg)
{
- struct msi_desc *desc = irq_data_get_irq_handler_data(data);
+ struct msi_desc *desc = irq_data_get_msi_desc(data);
struct platform_msi_priv_data *priv_data;
priv_data = desc->platform.msi_priv_data;
--
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