[fix] set MAX_RW_SIZE in riscv console read and write

modules/axhal/src/platform/riscv64_qemu_virt/console.rs

@@ -3,7 +3,7 @@ use memory_addr::VirtAddr;
 use crate::mem::virt_to_phys;
 
 /// The maximum number of bytes that can be read at once.
-const MAX_READ_SIZE: usize = 256;
+const MAX_RW_SIZE: usize = 256;
 
 /// Writes a byte to the console.
 pub fn putchar(c: u8) {
@@ -13,7 +13,7 @@ pub fn putchar(c: u8) {
 /// Writes bytes to the console from input u8 slice.
 pub fn write_bytes(bytes: &[u8]) {
     sbi_rt::console_write(sbi_rt::Physical::new(
-        bytes.len(),
+        bytes.len().min(MAX_RW_SIZE),
         virt_to_phys(VirtAddr::from_ptr_of(bytes.as_ptr())).as_usize(),
         0,
     ));
@@ -23,7 +23,7 @@ pub fn write_bytes(bytes: &[u8]) {
 /// Returns the number of bytes read.
 pub fn read_bytes(bytes: &mut [u8]) -> usize {
     sbi_rt::console_read(sbi_rt::Physical::new(
-        bytes.len().min(MAX_READ_SIZE),
+        bytes.len().min(MAX_RW_SIZE),
         virt_to_phys(VirtAddr::from_mut_ptr_of(bytes.as_mut_ptr())).as_usize(),
         0,
     ))