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Replace kmalloc() followed by copy_from_user() with memdup_user() to simplify and improve pqi_passthru_ioctl(). Since memdup_user() already allocates memory, use kzalloc() in the else branch instead of manually zeroing 'kernel_buffer' using memset(0). Return early if an error occurs. No functional changes intended. Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev> Acked-by: Don Brace <don.brace@microchip.com> Message-Id: <20250922201832.1697874-2-thorsten.blum@linux.dev> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>