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The current function that both allocates and adds the interrupter isn't optimal when using several interrupters. The array of interrupters need to be protected with a lock while adding or removing interrupters. If memory is allocated under the default xhci spinlock then GFP_KERNEL can't be used. There is no need to allocate the interrupter memory under the lock, so split this code into separate unlocked allocate part, and a lock protected add part. Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com> Message-ID: <20230602144009.1225632-6-mathias.nyman@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>