Revert "gpib: cb7210: Fix region leak when request_irq fails"

This reverts commit 2eae90a.

Turns out not to be correct.

Link: https://lore.kernel.org/r/PpNUbGhrvT8I_KayoDvQYI2PYjmMw1QEkuVBDZz2PwBsVVgPkBXJarc2mBM0IhiH3AQG0GtgqEsDRXNj3yUKEDBaZa25u73pAjvcE6vfRsg=@protonmail.com
Reported-by: Dominik Karol Piątkowski <dominik.karol.piatkowski@protonmail.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Hongling Zeng <zhongling0719@126.com>
Cc: Hongling Zeng <zenghongling@kylinos.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: gregkh

drivers/gpib/cb7210/cb7210.c

@@ -1049,8 +1049,7 @@ static int cb_isa_attach(struct gpib_board *board, const struct gpib_board_confi
 	if (!request_region(config->ibbase, cb7210_iosize, DRV_NAME)) {
 		dev_err(board->gpib_dev, "ioports starting at 0x%x are already in use\n",
 			config->ibbase);
-		retval = -EBUSY;
-		goto err_release_region;
+		return -EBUSY;
 	}
 	nec_priv->iobase = config->ibbase;
 	cb_priv->fifo_iobase = nec7210_iobase(cb_priv);
@@ -1063,16 +1062,11 @@ static int cb_isa_attach(struct gpib_board *board, const struct gpib_board_confi
 	// install interrupt handler
 	if (request_irq(config->ibirq, cb7210_interrupt, isr_flags, DRV_NAME, board)) {
 		dev_err(board->gpib_dev, "failed to obtain IRQ %d\n", config->ibirq);
-		retval = -EBUSY;
-		goto err_release_region;
+		return -EBUSY;
 	}
 	cb_priv->irq = config->ibirq;
 
 	return cb7210_init(cb_priv, board);
-
-err_release_region:
-	release_region(nec7210_iobase(cb_priv), cb7210_iosize);
-	return retval;
 }
 
 static void cb_isa_detach(struct gpib_board *board)