[PATCH] hostap: allow flashing firmware

Host AP driver has code to support writing firmware to non-volatile
memory, a.k.a. flash.  This code has been extensively tested when Host
AP was a standalone driver.

Add a configuration option to the kernel to allow enabling this
functionality.  Improve the description of the RAM download option.
Mention cards that require it.  Remove obsolete scary comment.

Signed-off-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 18 insertions, 4 deletions

diff --git a/drivers/net/wireless/hostap/Kconfig b/drivers/net/wireless/hostap/Kconfig
index 56f41c714d38..c8f6286dd35f 100644
--- a/drivers/net/wireless/hostap/Kconfig
+++ b/drivers/net/wireless/hostap/Kconfig
@@ -26,11 +26,25 @@ config HOSTAP_FIRMWARE
         depends on HOSTAP
         ---help---
         Configure Host AP driver to include support for firmware image
-        download. Current version supports only downloading to volatile, i.e.,
-        RAM memory. Flash upgrade is not yet supported.
+        download. This option by itself only enables downloading to the
+        volatile memory, i.e. the card RAM. This option is required to
+        support cards that don't have firmware in flash, such as D-Link
+        DWL-520 rev E and D-Link DWL-650 rev P.
 
-        Firmware image downloading needs user space tool, prism2_srec. It is
-        available from http://hostap.epitest.fi/.
+        Firmware image downloading needs a user space tool, prism2_srec.
+        It is available from http://hostap.epitest.fi/.
+
+config HOSTAP_FIRMWARE_NVRAM
+        bool "Support for non-volatile firmware download"
+        depends on HOSTAP_FIRMWARE
+        ---help---
+        Allow Host AP driver to write firmware images to the non-volatile
+        card memory, i.e. flash memory that survives power cycling.
+        Enable this option if you want to be able to change card firmware
+        permanently.
+
+        Firmware image downloading needs a user space tool, prism2_srec.
+        It is available from http://hostap.epitest.fi/.
 
 config HOSTAP_PLX
         tristate "Host AP driver for Prism2/2.5/3 in PLX9052 PCI adaptors"