update kernel to 5.10.198

hc

2024-01-03 2f7c68cb55ecb7331f2381deb497c27155f32faf

 kernel/drivers/tty/n_gsm.c
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@@ -50,6 +50,7 @@
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 #include <linux/netdevice.h>
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 #include <linux/etherdevice.h>
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 #include <linux/gsmmux.h>
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+#include "tty.h"
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 static int debug;
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 module_param(debug, int, 0600);
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@@ -2158,12 +2159,13 @@
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 static void gsm_cleanup_mux(struct gsm_mux *gsm, bool disc)
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 {
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 	int i;
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-	struct gsm_dlci *dlci = gsm->dlci[0];
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+	struct gsm_dlci *dlci;
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 	struct gsm_msg *txq, *ntxq;
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 	gsm->dead = true;
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 	mutex_lock(&gsm->mutex);
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+	dlci = gsm->dlci[0];
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 	if (dlci) {
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 		if (disc && dlci->state != DLCI_CLOSED) {
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 			gsm_dlci_begin_close(dlci);
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@@ -2177,8 +2179,10 @@
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 	/* Free up any link layer users and finally the control channel */
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 	for (i = NUM_DLCI - 1; i >= 0; i--)
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-		if (gsm->dlci[i])
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+		if (gsm->dlci[i]) {
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 			gsm_dlci_release(gsm->dlci[i]);
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+			gsm->dlci[i] = NULL;
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+		}
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 	mutex_unlock(&gsm->mutex);
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 	/* Now wipe the queues */
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 	tty_ldisc_flush(gsm->tty);