firewire: core: non-atomic memory allocation for isochronous event to user client

In the former commits, the callback of isochronous context runs on work
process, thus no need to use atomic memory allocation.

This commit replaces GFP_ATOMIC with GCP_KERNEL in the callback for user
client.

Tested-by: Edmund Raile <edmund.raile@protonmail.com>
Link: https://lore.kernel.org/r/20240904125155.461886-5-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>

Author: takaswie

drivers/firewire/core-cdev.c

@@ -982,7 +982,7 @@ static void iso_callback(struct fw_iso_context *context, u32 cycle,
 	struct client *client = data;
 	struct iso_interrupt_event *e;
 
-	e = kmalloc(sizeof(*e) + header_length, GFP_ATOMIC);
+	e = kmalloc(sizeof(*e) + header_length, GFP_KERNEL);
 	if (e == NULL)
 		return;
 
@@ -1001,7 +1001,7 @@ static void iso_mc_callback(struct fw_iso_context *context,
 	struct client *client = data;
 	struct iso_interrupt_mc_event *e;
 
-	e = kmalloc(sizeof(*e), GFP_ATOMIC);
+	e = kmalloc(sizeof(*e), GFP_KERNEL);
 	if (e == NULL)
 		return;