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Date: Sat, 27 Nov 2021 02:20:14 +0100 (CET) From: Thomas Gleixner <tglx@...utronix.de> To: LKML <linux-kernel@...r.kernel.org> Cc: Bjorn Helgaas <helgaas@...nel.org>, Marc Zygnier <maz@...nel.org>, Alex Williamson <alex.williamson@...hat.com>, Kevin Tian <kevin.tian@...el.com>, Jason Gunthorpe <jgg@...dia.com>, Megha Dey <megha.dey@...el.com>, Ashok Raj <ashok.raj@...el.com>, linux-pci@...r.kernel.org, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Santosh Shilimkar <ssantosh@...nel.org>, iommu@...ts.linux-foundation.org, dmaengine@...r.kernel.org, Stuart Yoder <stuyoder@...il.com>, Laurentiu Tudor <laurentiu.tudor@....com>, Nishanth Menon <nm@...com>, Tero Kristo <kristo@...nel.org>, linux-arm-kernel@...ts.infradead.org, x86@...nel.org, Vinod Koul <vkoul@...nel.org>, Mark Rutland <mark.rutland@....com>, Will Deacon <will@...nel.org>, Sinan Kaya <okaya@...nel.org> Subject: [patch 05/37] platform-msi: Allocate MSI device data on first use Allocate the MSI device data on first invocation of the allocation function for platform MSI private data. Signed-off-by: Thomas Gleixner <tglx@...utronix.de> --- drivers/base/platform-msi.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) --- a/drivers/base/platform-msi.c +++ b/drivers/base/platform-msi.c @@ -204,6 +204,8 @@ platform_msi_alloc_priv_data(struct devi 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 devi 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 devi 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); }
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