From d6d1b650ae6acce73d55dd0246de22180303ae73 Mon Sep 17 00:00:00 2001 From: Rusty Russell Date: Wed, 11 Aug 2010 23:04:27 -0600 Subject: param: simple locking for sysfs-writable charp parameters Since the writing to sysfs can free the old one, we need to block that when we access the charp variables. Signed-off-by: Rusty Russell Reviewed-by: Takashi Iwai Tested-by: Phil Carmody Cc: Jeff Dike Cc: Dan Williams Cc: John W. Linville Cc: Jing Huang Cc: James E.J. Bottomley Cc: Greg Kroah-Hartman Cc: Johannes Berg Cc: David S. Miller Cc: user-mode-linux-devel@lists.sourceforge.net Cc: libertas-dev@lists.infradead.org Cc: linux-wireless@vger.kernel.org Cc: netdev@vger.kernel.org Cc: linux-scsi@vger.kernel.org Cc: linux-usb@vger.kernel.org --- drivers/usb/atm/ueagle-atm.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/usb/atm') diff --git a/drivers/usb/atm/ueagle-atm.c b/drivers/usb/atm/ueagle-atm.c index 5b3f555e01c9..ea071a5b6eee 100644 --- a/drivers/usb/atm/ueagle-atm.c +++ b/drivers/usb/atm/ueagle-atm.c @@ -1577,6 +1577,7 @@ static void cmvs_file_name(struct uea_softc *sc, char *const cmv_name, int ver) char file_arr[] = "CMVxy.bin"; char *file; + kparam_block_sysfs_write(cmv_file); /* set proper name corresponding modem version and line type */ if (cmv_file[sc->modem_index] == NULL) { if (UEA_CHIP_VERSION(sc) == ADI930) @@ -1595,6 +1596,7 @@ static void cmvs_file_name(struct uea_softc *sc, char *const cmv_name, int ver) strlcat(cmv_name, file, UEA_FW_NAME_MAX); if (ver == 2) strlcat(cmv_name, ".v2", UEA_FW_NAME_MAX); + kparam_unblock_sysfs_write(cmv_file); } static int request_cmvs_old(struct uea_softc *sc, -- cgit v1.2.3