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hc
2023-12-06 08f87f769b595151be1afeff53e144f543faa614 
 kernel/drivers/isdn/hardware/mISDN/hfcsusb.c
....@@ -1,23 +1,9 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /* hfcsusb.c
23  * mISDN driver for Colognechip HFC-S USB chip
34  *
45  * Copyright 2001 by Peter Sprenger (sprenger@moving-bytes.de)
56  * Copyright 2008 by Martin Bachem (info@bachem-it.com)
6
- *
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- * This program is free software; you can redistribute it and/or modify
8
- * it under the terms of the GNU General Public License as published by
9
- * the Free Software Foundation; either version 2, or (at your option)
10
- * any later version.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, write to the Free Software
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- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20
- *
217  *
228  * module params
239  *   debug=<n>, default=0, with n=0xHHHHGGGG
....@@ -60,7 +46,7 @@
6046 static void hfcsusb_stop_endpoint(struct hfcsusb *hw, int channel);
6147 static int  hfcsusb_setup_bch(struct bchannel *bch, int protocol);
6248 static void deactivate_bchannel(struct bchannel *bch);
63
-static void hfcsusb_ph_info(struct hfcsusb *hw);
49
+static int  hfcsusb_ph_info(struct hfcsusb *hw);
6450 
6551 /* start next background transfer for control channel */
6652 static void
....@@ -255,15 +241,17 @@
255241  * send full D/B channel status information
256242  * as MPH_INFORMATION_IND
257243  */
258
-static void
244
+static int
259245 hfcsusb_ph_info(struct hfcsusb *hw)
260246 {
261247 	struct ph_info *phi;
262248 	struct dchannel *dch = &hw->dch;
263249 	int i;
264250 
265
-	phi = kzalloc(sizeof(struct ph_info) +
266
-		      dch->dev.nrbchan * sizeof(struct ph_info_ch), GFP_ATOMIC);
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+	phi = kzalloc(struct_size(phi, bch, dch->dev.nrbchan), GFP_ATOMIC);
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+	if (!phi)
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+		return -ENOMEM;
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+
267255 	phi->dch.ch.protocol = hw->protocol;
268256 	phi->dch.ch.Flags = dch->Flags;
269257 	phi->dch.state = dch->state;
....@@ -273,9 +261,10 @@
273261 		phi->bch[i].Flags = hw->bch[i].Flags;
274262 	}
275263 	_queue_data(&dch->dev.D, MPH_INFORMATION_IND, MISDN_ID_ANY,
276
-		    sizeof(struct ph_info_dch) + dch->dev.nrbchan *
277
-		    sizeof(struct ph_info_ch), phi, GFP_ATOMIC);
264
+		    struct_size(phi, bch, dch->dev.nrbchan), phi, GFP_ATOMIC);
278265 	kfree(phi);
266
+
267
+	return 0;
279268 }
280269 
281270 /*
....@@ -360,8 +349,7 @@
360349 			ret = l1_event(dch->l1, hh->prim);
361350 		break;
362351 	case MPH_INFORMATION_REQ:
363
-		hfcsusb_ph_info(hw);
364
-		ret = 0;
352
+		ret = hfcsusb_ph_info(hw);
365353 		break;
366354 	}
367355 
....@@ -416,8 +404,7 @@
416404 			       hw->name, __func__, cmd);
417405 		return -1;
418406 	}
419
-	hfcsusb_ph_info(hw);
420
-	return 0;
407
+	return hfcsusb_ph_info(hw);
421408 }
422409 
423410 static int
....@@ -708,7 +695,7 @@
708695 	switch (protocol) {
709696 	case (-1):	/* used for init */
710697 		bch->state = -1;
711
-		/* fall through */
698
+		fallthrough;
712699 	case (ISDN_P_NONE):
713700 		if (bch->state == ISDN_P_NONE)
714701 			return 0; /* already in idle state */
....@@ -759,8 +746,7 @@
759746 			handle_led(hw, (bch->nr == 1) ? LED_B1_OFF :
760747 				   LED_B2_OFF);
761748 	}
762
-	hfcsusb_ph_info(hw);
763
-	return 0;
749
+	return hfcsusb_ph_info(hw);
764750 }
765751 
766752 static void
....@@ -853,8 +839,8 @@
853839 		if (maxlen < 0) {
854840 			if (rx_skb)
855841 				skb_trim(rx_skb, 0);
856
-			pr_warning("%s.B%d: No bufferspace for %d bytes\n",
857
-				   hw->name, fifo->bch->nr, len);
842
+			pr_warn("%s.B%d: No bufferspace for %d bytes\n",
843
+				hw->name, fifo->bch->nr, len);
858844 			spin_unlock_irqrestore(&hw->lock, flags);
859845 			return;
860846 		}