Fix state not set bug

Author: fangpenlin

src/storage/sd_card.rs

@@ -90,7 +90,7 @@ impl<'a> SDCardStorage<'a> {
     }
 
     pub fn mount(&mut self, mount_path: &str, max_fds: usize) -> anyhow::Result<()> {
-        match replace(&mut self.state, SDCardState::Init) {
+        self.state = match replace(&mut self.state, SDCardState::Init) {
             SDCardState::Init => {
                 bail!("Driver not installed yet");
             }
@@ -116,7 +116,6 @@ impl<'a> SDCardStorage<'a> {
             SDCardState::Init => None,
             SDCardState::DriverInstalled { driver } => Some(driver.card()),
             SDCardState::Mounted { card, .. } => Some(card),
-            _ => None,
         }
     }
 }

src/usb/msc_device.rs

@@ -32,7 +32,7 @@ impl Storage for SDCardStorage<'_> {
             ..Default::default()
         };
         esp!(unsafe { tinyusb_msc_storage_init_sdmmc(&config) })
-            .with_context(|| "Failed to initialize spiflash for msc storage")?;
+            .with_context(|| "Failed to initialize sd for msc storage")?;
         Ok(())
     }
 }