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platform-msi: Allocate MSI device data on first use

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Allocate the MSI device data on first invocation of the allocation function
for platform MSI private data.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221813.805529729@linutronix.de
This commit is contained in:
Thomas Gleixner 2021-12-10 23:18:58 +01:00
parent 93296cd132
commit 077aeadb6c
1 changed files with 7 additions and 1 deletions
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8
drivers/base/platform-msi.c
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@ -204,6 +204,8 @@ platform_msi_alloc_priv_data(struct device *dev, unsigned int nvec,
irq_write_msi_msg_t write_msi_msg)
{
struct platform_msi_priv_data *datap;
int err;
/*
* Limit the number of interrupts to 2048 per device. Should we
* need to bump this up, DEV_ID_SHIFT should be adjusted
@ -218,6 +220,10 @@ platform_msi_alloc_priv_data(struct device *dev, unsigned int nvec,
return ERR_PTR(-EINVAL);
}
err = msi_setup_device_data(dev);
if (err)
return ERR_PTR(err);
/* Already had a helping of MSI? Greed... */
if (!list_empty(dev_to_msi_list(dev)))
return ERR_PTR(-EBUSY);
@ -229,7 +235,7 @@ platform_msi_alloc_priv_data(struct device *dev, unsigned int nvec,
datap->devid = ida_simple_get(&platform_msi_devid_ida,
0, 1 << DEV_ID_SHIFT, GFP_KERNEL);
if (datap->devid < 0) {
int err = datap->devid;
err = datap->devid;
kfree(datap);
return ERR_PTR(err);
}