From owner-svn-src-all@FreeBSD.ORG Sun Jan 12 11:44:28 2014 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id C4826BF9; Sun, 12 Jan 2014 11:44:28 +0000 (UTC) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id A363B1A5D; Sun, 12 Jan 2014 11:44:28 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.7/8.14.7) with ESMTP id s0CBiSt0087283; Sun, 12 Jan 2014 11:44:28 GMT (envelope-from hselasky@svn.freebsd.org) Received: (from hselasky@localhost) by svn.freebsd.org (8.14.7/8.14.7/Submit) id s0CBiS8B087282; Sun, 12 Jan 2014 11:44:28 GMT (envelope-from hselasky@svn.freebsd.org) Message-Id: <201401121144.s0CBiS8B087282@svn.freebsd.org> From: Hans Petter Selasky Date: Sun, 12 Jan 2014 11:44:28 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r260559 - head/sys/dev/usb/serial X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 12 Jan 2014 11:44:28 -0000 Author: hselasky Date: Sun Jan 12 11:44:28 2014 New Revision: 260559 URL: http://svnweb.freebsd.org/changeset/base/260559 Log: Don't do synchronous USB requests inside USB transfer callbacks. It is technically OK, but not recommended. MFC after: 1 weeks Modified: head/sys/dev/usb/serial/umcs.c Modified: head/sys/dev/usb/serial/umcs.c ============================================================================== --- head/sys/dev/usb/serial/umcs.c Sat Jan 11 23:10:59 2014 (r260558) +++ head/sys/dev/usb/serial/umcs.c Sun Jan 12 11:44:28 2014 (r260559) @@ -121,8 +121,6 @@ struct umcs7840_softc_oneport { uint8_t sc_lcr; /* local line control register */ uint8_t sc_mcr; /* local modem control register */ - uint8_t sc_lsr; /* local line status register */ - uint8_t sc_msr; /* local modem status register */ }; struct umcs7840_softc { @@ -535,12 +533,7 @@ umcs7840_cfg_open(struct ucom_softc *uco if (umcs7840_set_reg_sync(sc, umcs7840_port_registers[pn].reg_control, data)) return; - /* Read LSR & MSR */ - if (umcs7840_get_UART_reg_sync(sc, pn, MCS7840_UART_REG_LSR, &sc->sc_ports[pn].sc_lsr)) - return; - if (umcs7840_get_UART_reg_sync(sc, pn, MCS7840_UART_REG_MSR, &sc->sc_ports[pn].sc_msr)) - return; - DPRINTF("Port %d has been opened, LSR=%02x MSR=%02x\n", pn, sc->sc_ports[pn].sc_lsr, sc->sc_ports[pn].sc_msr); + DPRINTF("Port %d has been opened\n", pn); } static void @@ -748,9 +741,17 @@ static void umcs7840_cfg_get_status(struct ucom_softc *ucom, uint8_t *lsr, uint8_t *msr) { struct umcs7840_softc *sc = ucom->sc_parent; + uint8_t pn = ucom->sc_portno; + uint8_t hw_lsr = 0; /* local line status register */ + uint8_t hw_msr = 0; /* local modem status register */ + + /* Read LSR & MSR */ + umcs7840_get_UART_reg_sync(sc, pn, MCS7840_UART_REG_LSR, &hw_lsr); + umcs7840_get_UART_reg_sync(sc, pn, MCS7840_UART_REG_MSR, &hw_msr); + + *lsr = hw_lsr; + *msr = hw_msr; - *lsr = sc->sc_ports[ucom->sc_portno].sc_lsr; - *msr = sc->sc_ports[ucom->sc_portno].sc_msr; DPRINTF("Port %d status: LSR=%02x MSR=%02x\n", ucom->sc_portno, *lsr, *msr); } @@ -781,21 +782,11 @@ umcs7840_intr_callback(struct usb_xfer * case MCS7840_UART_ISR_RXERR: case MCS7840_UART_ISR_RXHASDATA: case MCS7840_UART_ISR_RXTIMEOUT: - /* Read new LSR */ - if (umcs7840_get_UART_reg_sync(sc, pn, MCS7840_UART_REG_LSR, &sc->sc_ports[pn].sc_lsr)) - break; /* Inner switch */ + case MCS7840_UART_ISR_MSCHANGE: ucom_status_change(&sc->sc_ucom[subunit]); - /* Inner switch */ break; - case MCS7840_UART_ISR_TXEMPTY: + default: /* Do nothing */ - break; /* Inner switch */ - case MCS7840_UART_ISR_MSCHANGE: - /* Read new MSR */ - if (umcs7840_get_UART_reg_sync(sc, pn, MCS7840_UART_REG_MSR, &sc->sc_ports[pn].sc_msr)) - break; /* Inner switch */ - DPRINTF("Port %d: new MSR %02x\n", pn, sc->sc_ports[pn].sc_msr); - ucom_status_change(&sc->sc_ucom[subunit]); break; } }