#10944 NORM 11.2.0-: rfkill driver stopping/starting mmc host unnecessarily

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#10944: rfkill driver stopping/starting mmc host unnecessarily
--------------------+-------------------------------------------------------
 Reporter:  dsd     |                 Owner:  dsd          
     Type:  defect  |                Status:  new          
 Priority:  normal  |             Milestone:  11.2.0-M4    
Component:  kernel  |               Version:  not specified
 Keywords:          |           Next_action:  never set    
 Verified:  0       |   Deployment_affected:               
Blockedby:          |              Blocking:               
--------------------+-------------------------------------------------------
 olpc-2.6.35 commit bed7edc535cdaafbff7ee59c81e647f4720fc53b fixed the
 rfkill driver but made it touch card state unnecessarily - I didn't
 realise that rfkill gets called during bootup and suspend/resume even
 though there is no state change actually happening.

 This causes the following to happen during boot:

 {{{
 [   15.000032] mmc1: Timeout waiting for hardware interrupt.
 [   15.010016] sdhci: ============== REGISTER DUMP ==============
 [   15.010016] sdhci: Sys addr: 0x00000000 | Version:  0x00000000
 [   15.010016] sdhci: Blk size: 0x00000000 | Blk cnt:  0x00000000
 [   15.010016] sdhci: Argument: 0x00000000 | Trn mode: 0x00000000
 [   15.010016] sdhci: Present:  0x01ff0000 | Host ctl: 0x00000000
 [   15.010016] sdhci: Power:    0x00000000 | Blk gap:  0x00000000
 [   15.010016] sdhci: Wake-up:  0x00000000 | Clock:    0x00000000
 [   15.010016] sdhci: Timeout:  0x00000000 | Int stat: 0x00000000
 [   15.010016] sdhci: Int enab: 0x00ff00c3 | Sig enab: 0x00ff00c3
 [   15.010016] sdhci: AC12 err: 0x00000000 | Slot int: 0x00000000
 [   15.010016] sdhci: Caps:     0x056030b0 | Max curr: 0x00f001f0
 [   15.010016] sdhci: ===========================================
 [   15.012480] mmc1: error -110 whilst initialising SDIO card
 [   15.108128] mmc2: new high speed SDHC card at address dcb1
 [   15.125704] mmcblk0: mmc2:dcb1 SU04G 3.69 GiB
 [   15.126039]  mmcblk0: p1 p2
 [   15.232836] mmc1: new SDIO card at address 0001
 }}}

 And it means that the card is also removed and reprobed during every
 resume.

-- 
Ticket URL: <http://dev.laptop.org/ticket/10944>
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